# The mean is 18.1 The z-score for 13.0 is - 1.7. What is the standard deviation for this data set

12,617 questions-
## statistics

Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18

*asked by Charlie on April 3, 2011* -
## statistics

Three students take equivalent stress tests. Which is the highest relative score? a. A score of 144 on a test with a mean of 128 and a standard deviation of 34. b. A score of 90 on a test with a mean of 86 and a standard deviation of 18. c. A score of 18

*asked by Charlie on April 3, 2011* -
## statistics

So if a depression scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard

*asked by phil on July 18, 2012* -
## statistics

So if a scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard deviation in the

*asked by phil on July 18, 2012* -
## Statistics

Students were given an exam with 300 multiple-choice questions. The distribution of the scores was normal and mean was 195 with a standard deviation of 30. What were the scores of the students who were within one standard deviation of the mean? What

*asked by Patty on January 31, 2010* -
## statistics

Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw

*asked by Beverly on March 22, 2011* -
## Math

On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three students were reported as follows: Student Opie has a T-score of 60. Student Paul has a z-score of -1.00. Student Quincy has a

*asked by Kathy on January 2, 2011* -
## Stasistic

On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three students were reported as follows: Student Opie has a T-score of 60. Student Paul has a z-score of -1.00. Student Quincy has a

*asked by Ramona on June 20, 2011* -
## Stastics

When we convert x-value to z- score and use Standard Normal distribution, which of the following statements is true? a) The mean of z-score is zero and standard deviation of the z-scores is the same as the standard deviation of original data b) The mean

*asked by Mary on March 7, 2010* -
## math

Students were given an exam with 300 multiple-choice questions. The distribution of the scores was normal and mean was 195 with a standard deviation of 30. You may find it helpful to draw out this distribution before answering the questions below What were

*asked by Patty on January 31, 2010* -
## statistics

A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets, then

*asked by Jeniffer on August 5, 2009* -
## Statistics

A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not? I understand that the score in question is 3 standard deviations above the mean. But I thought that I would need

*asked by Terri on November 9, 2014* -
## statistics

Can you please tell me how to solve for the following? Pedro took an exam in a class in which the mean was 64 with a standard deviation of 6. If his z score was +3, what was his exam score? A students commute to school is normally distributed with a mean

*asked by Sandra on July 28, 2013* -
## MATH

A mean score on a standardized test is 50 with a standard deviation of 10. Answer the following a. What scores fall between –1 and +1 standard deviation? b. What percent of all scores fall between –1 and +1 standard deviation? c. What score falls at +2

*asked by Bridget on April 3, 2012* -
## statistic of behavioral science

for each of the following, identify the exam score that should lead to the better grade. In each case, explain your answer. A score of x=56, on an exam with the mean =50 and the standard deviation of 4; or a score of x=60 on an exam with the mean=50 and

*asked by Janice on June 22, 2013* -
## math

i took the sat and received a score of 488 on the math section. the average score was 445 with a standard deviation of 110. where does my score fit in the sample and what is the z score?

*asked by patricia on July 29, 2011* -
## Foundations of Measurement

Approximately 400,000 students took the GRE in 2009. Observed mean for the Verbal score was 540 with a standard deviation of 80, and the observed mean quantitative score was 500 with a standard deviation of 100. Assuming distribution was normal, answer the

*asked by Dawn on November 9, 2014* -
## statistics

The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. What percentage score above 1300? What percentage score above 800?

*asked by Jeremy on September 21, 2014* -
## psy

Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw

*asked by mary on February 1, 2010* -
## math30

The Mean and the Standard Deviation Last year, golfers at Smith Ranch golf course had a mean score of 41 and a standard deviation of 2 on the first nine holes of the course, and a mean of 38 and a standard deviation of 1.8 on the last nine holes. One

*asked by alejandro on February 13, 2013* -
## statistics

What is the probability of 62 if the mean is 60 and the standard deviation 7 what is the proportion between 45 and78 if the mean is 60 and the standard deviation 7 what is the z score of 78 what is the z score of 45

*asked by Bonnie on September 22, 2010* -
## Statistics

Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both

*asked by Peter on January 9, 2009* -
## AP Stats

Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both

*asked by Peter on January 9, 2009* -
## Algebra II

Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both

*asked by Bob on January 10, 2009* -
## AP Statistics

*asked by Peter on January 9, 2009* -
## statistics

assuming that you wished to have the highest possible score on an exam relative to ht e other scores, would you rather have a score of 70 on a test with a mean of 60 and a standard deviations of 5.2 or a score of 81 on a test with a mean of 79 and a

*asked by nick on July 14, 2014* -
## Data Management

Emilio has played ten rounds of golf this season. His mean score is 80 and standard deviation is 4. Assume Emilio's golf scores are normally distributed. a) Find the 95% confidence interval of Emilio's mean golf score b)Find the 95% confidence interval of

*asked by Caroline on May 14, 2014* -
## math

Statistics: Analyze student exam scores Students were given an exam with 300 multiple choice questions. The distribution of the scores were normal and the mean was 195 with a standard deviation of 30. you may find it helpful to draw out this distribution

*asked by ro on March 21, 2012* -
## math (statistics

John's z-score on a college entrace exam is 1.3. If the raw scores have a mean of 480 and a standard deviation of 70 points, what is his raw score? Use a z-score formula to find John's raw score. The formula: z = (x - mean)/sd -->sd = standard deviation

*asked by Joe on January 18, 2007* -
## statistics

Suppose that the mean score of an exam was 77 when taken 30 students took it on time with a standard deviation of 2. A makeup of the same exam is given to 6 students. The retakes averaged a score of 83 with a standard deviation of 2.9. What is the average

*asked by Pat on January 28, 2012* -
## statistics

Suppose that the mean score of an exam was 77 when taken 30 students took it on time with a standard deviation of 2. A makeup of the same exam is given to 6 students. The retakes averaged a score of 83 with a standard deviation of 2.9. What is the average

*asked by Pat on January 28, 2012* -
## statistics

A population has a norma distribution with a mean of 50 and a standard deviation of 10. what is ther standard z-score corresponding to to 70? what is the standard z-score corresponding to 40?

*asked by hallei on March 21, 2011* -
## Statistics

Suppose that two different tests A and B are to be given to a student chosen at random from a certain population. Suppose also that the mean score on test A is 85, and the standard deviation is 10; the mean score on test B is 90, and the standard deviation

*asked by Charles on February 16, 2011* -
## statistics

a mean score on a standardized test is 50 with a standard deviation of 10. What are the following: 1. what scores fall between -1 and +1 standard deviation? 2. what percent of all scores fall between -1 and +1 standard deviation? 3. what score falls at +2

*asked by erica on May 11, 2012* -
## statistics

2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule? 3. If we are focused on 68% of the normal distribution, what percentage of the distribution is left in the upper tail only? 4. What value

*asked by Cam on April 23, 2013* -
## stats

2. A standardized exam was provided to all 3rd graders in Arizona schools. The average score was 75 with a standard deviation of 10. Assuming that the scores were normally distributed, answer the following questions. (a) What z-score corresponds with a

*asked by taylor quenzler on July 26, 2012* -
## standard deviation

the mean is 3.5. dtandard deviation is .5. sally's score is 1.5 on test. how many standard deviations is she from the mean? billy scores 5. what is his standard score? what scale of measurement is being used? is it appropriate? why/why not?

*asked by dee on March 24, 2010* -
## statistics

The distribution score for a city wide math test scores results in a mean of 70 and a standard deviation of 12. What score is 2 standard deviations above the mean?

*asked by Anonymous on September 30, 2011* -
## Math

Score Percentile Score Percentile Score Percentile Score Percentile -3.5 0.02 -1 15.87 0 50 1.1 86.43 -3 0.13 -0.95 17.11 0.05 51.99 1.2 88.49 -2.9 0.19 -0.9 18.41 0.1 53.98 1.3 90.32 -2.8 0.26 -0.85 19.77 0.15 55.96 1.4 91.92 -2.7 0.35 -0.8 21.19 0.2

*asked by Need Help!!! on May 12, 2012* -
## statistics

Jack’s ACT score is 30. Jason’s SAT score is 950. Who did better? The mean SAT score is 1000 with a standard deviation of 100 SAT points. The mean ACT score is 22 with a standard deviation of 3 ACT points

*asked by Chris on March 27, 2012* -
## statistics

The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. 9. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. -1.71 10.What is the

*asked by Marty on April 18, 2014* -
## statistics

The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. -1.71 What is the raw

*asked by Stacey on April 15, 2014* -
## Statistics

You have a population that has a mean of 100 and a standard deviation of 15. You randomly draw 100 people out of this population and record the mean score. You repeat the process a large number of times recording the mean score for each sample you draw.

*asked by Jared on October 14, 2012* -
## Behavioral Statistics

You have a population that has a mean of 100 and a standard deviation of 15. You randomly draw 100 people out of this population and record the mean score. You repeat the process a large number of times recording the mean score for each sample you draw.

*asked by Jared on October 14, 2012* -
## math

I am having difficulty with statistics..I am taking stats 4, but haven't taken 3 yet. Explain deviation below or above the means please. ex. If bill received a NCE score deviation below the mean, what would his score be? which is 10. Can you explain the

*asked by dora on November 25, 2012* -
## statistics

Suppose scores on the mathematics section of the SAT follow a normal distribution with mean 540 and standard deviation 120. ACT math scores are normally distributed with a mean of 18 and a standard deviation of 8. What score on the ACT is equivalent to a

*asked by Anonymous on September 15, 2013* -
## statistics

Suppose scores on the mathematics section of the SAT follow a normal distribution with mean 540 and standard deviation 120. ACT math scores are normally distributed with a mean of 18 and a standard deviation of 8. What score on the ACT is equivalent to a

*asked by Anonymous on September 16, 2013* -
## Statistic

A distribution has a standard deviation of ó = 9.5. Find the z-score for a score above the mean by 4 points. note: round to 2 decimal places, and enter the value of the z-score but do not write "z = " in your answer

*asked by Emilia on October 17, 2011* -
## uop

9) A specific score in a distribution of data minus the mean and divided by the standard deviation produces a value known as aâ€¦? A. Beta B. Z Score C. Variability Score D. Coefficient of Determination

*asked by Linda on April 13, 2013* -
## Analytical Skills

If your score on a statistics exam was 76 and the professor gave you the distribution for the exam score for your class, you could find your percentile to understand where you stand in comparison to your fellow students. Assume that the distribution for

*asked by Jojo on October 6, 2011* -
## statistics

what are the mean and standard deviation of a sampling distribution consisting of samples of size 16? these sameples were drawn from a population whose mean is 25 and who standard deviation is 5. a. 25 and 1.25 b. 5 and 5 c. 25 and 5 d. 5 and 1.25 e. 25

*asked by helga on February 1, 2009* -
## Stats

A study found that for adults the general self-efficacy scale mean score was 35 and standard deviation was 12. A group of clients (n=14) was measured for their general self-efficacy with the same measure and found having 40 with standard deviation of 20. A

*asked by Mark on August 17, 2013* -
## Statistic

For 3 and 4 find the range, variance, and standard deviation. Round to the nearest tenth. 3. Twelve students were given an arithmetic test and the times (in minutes) to complete it were 10, 9, 12, 11, 8, 15, 9, 7, 8, 6, 12, 10 4. The normal daily

*asked by Artmisha on May 30, 2014* -
## Statistics

Check my answers please! Thanks a lot. Five students reported that the previous night they slept: 7,8,7,10,9 hours. Calculate the sample varience and standard deviation. sample varience = 1346.5 standard deviation = 36.7 Consider this. Ths standard

*asked by Jake on February 1, 2007* -
## Education 606

The Graduate Record Exam has combined verbal and quantitative mean of 1000 and a standard deviation of 200. Score range from 200 to 1600 and are approximately normally distributed. a. What percentage score above 800? b. Above what score do 20% of the

*asked by Stephanie Forbes on October 10, 2014* -
## statistics

The average score on a science test was 72 with a standard deviation of 6. The average score on a history test was 89 with a standard deviation of 7. Compare the variability of the two classes.

*asked by Hannah on March 20, 2012* -
## Math Statistics

Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam? b) What percentage of

*asked by JAE on October 13, 2014* -
## statistics

Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam? b) What percentage of

*asked by JAE on October 13, 2014* -
## math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution score = 15, ì = 16 , and ó = 2 Could you show me how to do this. My instructor has tried but I just don't understand how to do it and I have

*asked by sam on August 23, 2009* -
## statistics

A student was asked to compute the mean and standard deviation for the following sample of n _ 5 scores: 81, 87, 89, 86, and 87. To simplify the arithmetic, the student first subtracted 80 points from each score to obtain a new sample consisting of 1, 7,

*asked by Liz on June 22, 2011* -
## Statistics

A population has a mean of 30 and a standard deviation of 5. a. If 5 points were added to every score in the population, what would be the new values for the mean and standard deviation? b. If every score in the population were multiplied by 3 what

*asked by Nickie on January 26, 2013* -
## statistics

The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. Which portion of the bell curve relates to the answer? What is the

*asked by Josey on November 18, 2014* -
## statistics

In a recent study on gender differences in education, a sample of 7 boys had a mean score of 18.5 and a standard deviation of 4.1 on a Standardized Math Test. A sample of 11 girls had a mean score of 19.9 and a standard deviation of 3.6 on the same test.

*asked by Alex on March 24, 2013* -
## statistics

. In terms of the mean and standard deviation: - What does it mean to say that a particular value of x has a standard score of +1.5? - What does it mean to say that a particular value of x has a z-score of -2.6? Please show all work.

*asked by Anonymous on September 29, 2012* -
## statistics

If the mean I.Q. is 100 and the standard deviation of I.Q. scores is 15, then an I.Q. of 130 will have a z score (or standard score) of?

*asked by Anonymous on October 29, 2014* -
## Statistics

The Graduate Record Exam has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. A. What percentage of the persons who take the test score above 1300? b.

*asked by Charlene on November 23, 2014* -
## college statistics

a set of data is normally distributed with a mean of 1000 and a standard deviation of 100.what would be standard score for a score of 900.what percent of scores is betyween 1000 and 900.what would be percentile rank for a score of 900.

*asked by melba on June 3, 2012* -
## statistics

The scores on the final exam in a course have approximately a bell-shaped distribution. The mean score was 72, the highest score was 99, and the lowest score was 41. Use the value of the range (58) to estimate the value of the standard deviation. (Round

*asked by Chris on September 21, 2011* -
## Stats

The GRE has a combined verbal and quantitative mean of 1000 and standard deviation of 200. Scores range from 200 to 1600. a. what % of the persons score above 1300? b. above 800? c. below 1200? d. above what score do the top 20% of the test-takers score?

*asked by Terry on April 17, 2016* -
## statistics/ please help ASAP

a set of data is normally distributed with a mean of 500 and a standard deviation of 100. a) what would the standard score fora score of 700 be? b) what % of scores is between 500 and 700? c) what would the percentile rank for a score of 700 *please show

*asked by vedry frustrated please help and show work on October 28, 2010* -
## Statistics

The mean of a distribution of 1000 individuals' blood pressure is 85. If this number were translated into a Z score it would be equal to +1 standard deviations. True or False? I know to calculate a Z score the formula is Z= (X-sub-i minus the mean)/

*asked by Jeff on February 11, 2014* -
## psycholgy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula

*asked by mary on February 1, 2010* -
## psy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula

*asked by mary on February 1, 2010* -
## statistics

set of data is normally distributed with a mean of 200 and standard deviation of 50. · What would be the standard score for a score of 300? · What percentage of scores is between 200 and 300? · What would be the percentile rank for a score of 300?

*asked by Laynette on August 26, 2011* -
## statistics-normal distribution

a set of data is normally distributed with a mean of 500 and a standard deviation of 100. a) what would the standard score fora score of 700 be? b) what % of scores is between 500 and 700? c) what would the percentile rank for a score of 700?

*asked by mary- can someone please solve,lost on October 28, 2010* -
## statistic

In a population of exam scores, a score of X 48 corresponds to z1.00 and a score of X 36 corresponds to z –0.50. Find the mean and standard deviation for the population. (Hint: Sketch the distribution and locate the two scores on your sketch.) A

*asked by Nickie on January 26, 2013* -
## Math

In the average ball game, the sum of the scores of both teams is 4545, with a standard deviation of 55. If the score of a game resulted in a z-score of 1.801.80 and the winning team had a score of 3333, what was the other team's score?

*asked by Peewee on July 19, 2015* -
## Algebra 2

A normal distribution has a mean of 240 and a standard deviation of 4.8. What is a z-score of 230? What is a z-score of 245? Round to the nearest hundredth. Enter your answers in the boxes. A Z-score of 230 is 6 A Z-score of 245 is

*asked by Arianna on September 21, 2016* -
## stats

A set of data is normally distributed with a mean of 200 and standard deviation of 50. • What would be the standard score for a score of 250? • What percentage of scores is between 200 and 250? • What would be the percentile rank for a score of 250?

*asked by Dawn on October 9, 2012* -
## probability and statistics

Suppose every student in your class got a score of 85% on an exam. What are the mean and standard deviation of those exam scores without doing any calculations? I want to say the mean is 100 and the standard deviation is 1 but I don't know why. If all

*asked by Tiffany on June 17, 2014* -
## statistics

say that you have a distribution of exam scores with a mean of 57 and a standard deviation of 7. if a student in the class has a standard score equal to 2.429, what would their raw score on the exam be?

*asked by Dawn on December 2, 2012* -
## Statistics

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

*asked by Kendra on November 22, 2014* -
## Statistics

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

*asked by Samantha on August 1, 2015* -
## statistics

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

*asked by Martin on August 14, 2015* -
## social science statistics

a professor was curious to whether the students in a very large class she was teaching who turned in their first scored differently from the overall mean on the test.The overall mean score on the test was 75 with a standard deviation of 10;the score were

*asked by mike on April 9, 2013* -
## Statistics

Across the USA, results for these exams are normally distributed. What does that mean and why is this the case? If you were to create a histogram of all GRE scores, what would you expect the histogram to look like? Would it be symmetrical? Would it be bell

*asked by Natasha on December 16, 2015* -
## statistics

Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better

*asked by Anonymous on May 1, 2013* -
## math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution for raw score = Raw score = 66, µ =60 , and ó =6

*asked by Anonymous on July 18, 2010* -
## math

what is the z-score for the given raw score, mean and standard deviation, assume a normal probability dist. raw score=66,u=60, and 0=6 u and o are those wierd symbols is the answer 1, 10, 6, or 66

*asked by Diana on August 8, 2009* -
## math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution. Raw score = 124, μ = 98, and o = 17 A) 0.65 B) -1.53 C) -0.65 D) 1.53

*asked by JEN on November 18, 2009* -
## statistics

the average act score submitted to a certain university is 26. to be eligible for admission, a student must score in the top 6% of applicants. if the scores are normally distributed with a standard deviation of 2.4, what is the minimum score needed to be

*asked by roger on March 21, 2014* -
## Math ---HELP!!!!!

The mean score on the exit examination for an urban high school is 63 with a standard deviation of 9. What is the standard deviation of the distribution of sample means with a sample size of 9? A. 2 B. 3 C. 4 D. 4.1 answer B

*asked by angela on May 5, 2016* -
## Math

The mean score on the exit examination for an urban high school is 63 with a standard deviation of 9. What is the standard deviation of the distribution of sample means with a sample size of 9? A. 2 B. 3 C. 4 D. 4.1 answer B

*asked by angela on May 4, 2016* -
## statistics

1. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and a standard deviation of 4. Do not use the web calculator to answer the following questions. Instead, use the Z

*asked by Anonymous on February 6, 2016* -
## math

Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution. Raw score = 15, ì = 16 , and ó = 2

*asked by katie on November 1, 2009* -
## Quantitative Analysis

The "standard deviation of the sample score" divided by the "square root of the sample size" is the formula for computing the ...? A. Coefficiant of Determination B. Absolute Deviation C. Variance D. Standard Error

*asked by Stacie on November 6, 2013* -
## Statistics

The Graduate Record Examination (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: 1. Draw a rough sketch,

*asked by Jill on September 22, 2014* -
## statistics

The human resources department of an engineering company gives IQ tests to a randomly selected group of new hires every year. They claimed that the mean IQ score of new hires, , from this year is greater than or equal to the mean IQ score of new hires, ,

*asked by Brittany on August 3, 2014* -
## Math

For a class test, the mean score was 65, the median score was 71 and sthe standard deviation of the scores was 7. The teacher decided to add 5 points to each score due to a grading error. Which of the folloiwng must be true for thenew scores? TH

*asked by Gail on August 15, 2011* -
## Statistics

For the following set of scores, fill in the cells. The mean is 70 and the standard deviation is 8. Raw score Z score 68.0 ? ? –1.6 82.0 ? ? 1.8 69.0 ? ? –0.5 85.0 ? ? 1.7 72.0 ?

*asked by KIM on November 26, 2014*

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