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July 23, 2014

Search: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

Number of results: 11,043

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 sample consists of the ...
January 26, 2013 by Nickie

stat.
A sample consists of the following n  6 scores: 2, 7, 4, 6, 4, and 7. a. Compute the mean and standard deviation for the sample. b. Find the z-score for each score in the sample. c. Transform the original sample into a new sample with a mean of M  50 and s  10.
January 27, 2013 by Nickie

Statistics
For a population with a mean of =60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64 scores
December 13, 2013 by Lyndyc

Statistics
For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores c) a sample of n=25 scores Are the sample mean (...
May 24, 2011 by Aestas

Math
I need help with this these two problem PLEASE!!! For a population with a mean of μ  80 and a standard deviation of   12, find the z-score corresponding to each of the following samples. a. M  83 for a sample of n  4 scores b. M  83 for a sample of n  16 scores c. ...
February 1, 2013 by Tracy

statistics ***pls help!
for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 = 38 for the first sample, and s^2 =42 for the ...
April 14, 2011 by jerr ******

statistics
In this unit we have worked with scores and their locations within a distribution. This discussion is designed to get you to think a little more about distributions of scores. Shown below are two samples of scores. Input these scores into SPSS and use plots and data ...
February 26, 2012 by john

Statistic
For a population with a mean of μ  70 and a standard deviation of   20, how much error, on average, would you expect between the sample mean (M) and the population mean for each of the following sample sizes? a. n  4 scores b. n  16 scores c. n  25 scores
February 1, 2013 by Cookie

statistics
a sample of n=25 scores has a mean of M=60 and a std dev of s=12. Find the z-score corresponding to each of the following scores from this sample. X=66,X=48,X=84,X=55
February 7, 2008 by annabelle

statistics
On average, a sample of n=100 scores will provide a better estimate of the population mean than would be obtained from a sample of n=50 scores. (True or False)
July 5, 2011 by Anonymous

statistics
Can someone please explain to me the procedures for getting an answer to the questions. Step by step would be great since I'm very confused. I know it's probably simple. * Numerous studies have demonstrated that listening to music while studying can improve memory. To ...
February 28, 2008 by Lily

Statistics
Suppose that a sample of 50 scores has a mean of Y=90 and the standard deviation is 15. Between what two values of Y will at least 90% of the scores fall? What is the maximun number of scores that can lie out of the interval?
October 30, 2011 by Sara

statistics
1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below 20?
September 27, 2011 by Mich

statistics
In an extensive study involving thousands of British children, Arden and Plomin (2006) found significantly higher variance in the intelligence scores for males than for females. Following are hypothetical data, similar to the results obtained in the study. Note that the scores...
June 22, 2011 by Liz

probability and statistics
a population forms a normal distribution with a mean of u=80 and a standard deviation of o=15. for each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative value or an extreme value for a sample ...
January 6, 2012 by darrell

statistics
Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4 There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
September 9, 2011 by Jean

Statistics
Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?
September 9, 2011 by Jean

statistics
a distribution of scores has 6, but the value of the mean is unknown, a researcher plans to select a sample from the population in order to learn more about the unknown mean, if the sample consist of n= 9 scores , how accurately should sample mean represent the population mean
December 18, 2011 by herry

statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
November 29, 2011 by shirley

statistic
. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means. a. Each sample has n _ 5 scores with s2 _ 38 for the first sample and s2 _ 42...
November 11, 2012 by Sharon

statistics
A sample of n=5 scores has a mean 50. Another sample has n=10 scores and a mean of 60. If the two samples are combined, will the combined sample mean be greater than 55
February 9, 2011 by Carrie

statistics
A psychologist wants to estimate the variance of employee test scores. A random sample of 18 scores had a sample standard deviation 10.4. Find a 90% confidence 2 interval for the population variance. What assumption, if any, have you made in calculating this interval estimate?
November 9, 2011 by Janelle

Statistics
One sample of n=20 scores has a mean of M=50. A second sample of n=5 scores has a mean of Mean=10. If the two samples are combined, what is the mean
October 26, 2011 by Sher

statistics
Calculate SS, variance, and standard deviation for the following sample of n _ 4 scores: 3, 1, 1, 1. (Note: The computational formula works well with these scores.)
June 22, 2011 by Liz

statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
June 3, 2011 by neil

statistics
For a particular population, a sample of n = 4 scores has an expected value of 10. For the same population, a sample of n = 25 scores would have an expected value of ____. a. 4 b. 8 c. 10 d. 20
January 8, 2014 by Lyndyc

statistics
Want to find if students who are musicians have higher Iq test scores than the general population. the researcher predicts that playing music is associated with higher IQ scores. the researcher selects a sample of 75 musicians from area and gives them an IQ test. The mean for ...
March 30, 2013 by Laurie

statistics
A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores 1) Below 20 2) Above 40 3) Above 20 4) Below 40 5) Below...
September 30, 2011 by Brady

statistics
Calculate SS, variance, and standard deviation for the following sample of n=9 scores:2,0,0,0,0,2,0,2,0.(Note: The computational formula for SS works best with these scores.) I keep getting the wrong numbers. Thank You.
January 29, 2008 by Tracy

university of phoenix
4.Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use web-calculator to answer the following questions. Instead, you need to use the Z distribution table in ...
November 29, 2011 by shirley

Essentials of statistics
A populations of scores forms a normal distribution with a mean of 40 and a standard deviation of 12 what is the probability of selecting a sample of n=9 scores with a mean less than m=34
July 31, 2010 by Anonymous

statistics
10. A random sample of n=36 scores is selected from a normal distribution with a mean of u=60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M=52.
April 5, 2011 by Anonymous

John jay college
A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean?
July 22, 2012 by Samantha

statistics
A sample of n = 9 scores has a mean of M _ 10. One person with a score of X _ 2 is removed from the sample. What is the value for the new sample mean?
June 22, 2011 by Liz

Math
A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample. What is the value for the new sample mean?
October 20, 2012 by Sharon

stats
A random sample of n=16 scores is obtained from a population with a mean of = 80 and a treatment is administered to the sample. After treatment, the sample
March 20, 2013 by delaney

John jay college
A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean? z = 3.00 z = 1.00 z = 9.00 cannot determine without additional information
July 22, 2012 by Samantha

statistics
A random sample of n = 9 scores is obtained from a population with = 50 and = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean?
November 6, 2011 by Anonymous

statistics
A sample from a population with  = 40 and  = 10 has a mean of M = 44. If the sample mean corresponds to a z = 2.00, then how many scores are in the sample? a. n = 100 b. n = 25 c. n = 5 d. n = 4
January 8, 2014 by Lyndyc

stats
A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
January 23, 2012 by dan

phoenix
Each sample has n= 5 scores with s2 =38 for the first sample and s2 = 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)calculate how much difference should be expected, on average, ...
May 12, 2013 by diana

statistics
Scores on a national exam assume a normal distribution with a population mean of 50 and population standard deviation of 10 points. A sample of 36 exam scores was selected from UCA with a mean score of 58 points. Using a significance level of 0.01, determine whether scores on ...
April 18, 2014 by Anonymous

statistics
Below are six data sets with 6 randomly selected scores in each data set. Your task is to determine if the scores were drawn from a population with μ = 5. Before you calculate the one-sample t test for each sample, make a guess as to whether or not you think the sample ...
February 15, 2014 by Anonymous

statistics
A sample of n= 4 scores has SS equals 48 what is the estimated standard error for the sample mean
May 31, 2014 by Jamie

Discrete Mathematics
A tutor website wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ...
July 30, 2013 by Joy

Discrete Mathematics
3. A tutoring site wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ...
July 30, 2013 by Joy

stat
A sample consists of the following data 7,11,12,18,20,22,25. What is the sample variance?
December 11, 2012 by christopher

statistic
Given a normal population with = 40 and = 8, what is the probability of obtaining a sample mean between 39 and 41 for a sample of n = 16 scores?
March 9, 2011 by kim

Intro to Statistics
A sample has n = 9 scores and an SS = 216. What is the variance for this sample?
April 19, 2011 by Cristina

statistics Urgent please!!!!!!!!!!!!!!!!!!!!!
A sample of n = 5 scores has a mean of M = 12. What is x for this sample?
May 28, 2011 by Dottie

stats
sample of n=64 scores is obtained from population with standard deviation =15 sample mean is 10 pts greater than the poulation mean what is zscore for sample mean
March 22, 2013 by tita

Statistics
The variance of the mathematical scores of a sample of 21 high school girls was found to be 100 and that of a sample of 25 high school boys was 169. Test the hypothesis that the scores of the high school boys are more varying that those of the high school girls at alpha = 0.05...
January 27, 2014 by Anonymous

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a.Percentage of scores less than 100b.Relative frequency of scores ...
June 8, 2010 by Kim

statistics
. In a sample of n = 6, five individuals all have scores of X = 10 and the sixth person has a score of X = 16. What is the mean for this sample?
September 18, 2011 by toonie

Statistics
A sample of n = 9 scores is obtained from a population with = 70 and = 18. If the sample mean is M = 76, then what is the z-score for the sample mean? a. z = 0.33 b. z = 0.50 c. z = 1.00 d. z = 3.00
December 9, 2013 by Lyndyc

statistics
What formula do I use to solve: A sample with a mean of M = 40 and a variance of s2 = 20 has an estimated standard error of 2 points. How many scores are in the sample?
July 8, 2014 by brenda

statistics
A sample of n = 25 scores has M = 20 and s2 = 9. What is the sample standard deviation? a. 3 b. 4.5 c. 9 d. 81
December 26, 2013 by Lyn

Statistics
The mean of a population of raw scores is 33 1_X 5 122 . Use the criterion of .05 and the upper tail of the sampling distribution to test whether a sample with X 5 36.8 1N 5 302 represents this population. (a) What is the critical value? (b) Is the sample in the region of ...
February 13, 2014 by Anonymous

statistics
A researcher is testing the hypothesis that consuming a sports drink during exercise improves endurance. A sample of n=50 male college students is obtained and each student is given a series of three endurance tasks and asked to consume 4 ounces of the drink during each break ...
March 18, 2011 by Melissa Williams

Maths
A psychological test was given to 92 teenage boys and 68 teenage girls. The test was used to assign a score to each teenager, measured on the worry scale 0 (not worried) to 100 (very worried). A summary of the results is given in the table below. Girls; Sample Size 68 ...
May 12, 2011 by Tony

Math
Q1. A population has a mean of = 80 with σ = 20. a. If a single score is randomly selected from this population, how much distance, on average, should you find between the score and the population mean? 20 because the standard deviation is 20 b. If a sample of n = 4 ...
May 27, 2014 by Jamie

statistics
-A set of seven scores has a mean of 10. If one of the scores is changed from X=15 to X=1, what will be the new value for the new mean? -A sample of n=8 scores has a mean of M=12. One new score is added to the same and the new mean is found to be M=13. What is the vaule of the...
January 27, 2008 by Joan

statistics
A sample of n = 5 scores has a mean of M = 12. What is x for this sample?
May 28, 2011 by Dottie

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 and square root of 5 ...
February 1, 2009 by helga

statistics
Using teh 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores less than 100 b. relative frequency of scores less than 120 c...
May 10, 2010 by Christine

statistics
4. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use web-calculator to answer the following questions. Instead, you need to use the Z distribution table in ...
September 3, 2012 by Sandra

Math-statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantiles: a.percentage of scores less than 100 b. relative frequency of scores less than 120 c. percentage of scores less ...
March 1, 2013 by Jane Brown

Statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 b. Relative frequency of ...
March 31, 2010 by Ab

auguta tech
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0....
April 17, 2010 by cynthia

statistics
Assume that a set of test scores is normally distrbuted with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first.... a. Percentage of scores less than 100. b. Relative frequency of ...
May 8, 2010 by Renee

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 b. Relative frequency of ...
July 13, 2010 by Ab

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 b. Relative frequency of ...
August 20, 2011 by ann

statistics
A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no difference in the population mean scores of the two classes. The difference of the sample means is 51.4. If the standard deviation of the ...
July 7, 2014 by bobert

Statistics... I need help
. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: (Hint: Make a drawing and label first) a. Percentage of scores less than 100 b. Relative frequency of scores ...
April 19, 2010 by Adam

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b.Relative frequency of scores less than 120 c.Percentage of scores less ...
November 21, 2010 by TAW

statistics
Scores on the ACT college entrance exam are Normally distributed with a mean = 20 and standard deviation σ = 5. An SRS of 25 ACT scores is selected, construct a 95% Confidence Interval for the sample mean (X-Bar) and interpret your result.
December 3, 2012 by Alyssa

Statistics
SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. Using the formula for σM, what will σM be when a. the sample size is 25 b. the sample size is 121, and c. the sample size is 400?
November 18, 2013 by Mikos

Statistics
For a normal distribution with a mean of m = 80 and a standard deviation of s = 20, find the proportion of the population corresponding to each of the following scores. a. Scores greater than 85 b. Scores less than 100 c. Scores between 70 and 90 I believe this is the correct ...
July 26, 2010 by Lyndon

statistics
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 = ...
July 25, 2010 by Trish

statistics
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 b...
August 16, 2010 by sweet

stats
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. Percentage of scores less than 100 b...
September 20, 2010 by Jenn

statistic
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. Percentage of scores less than 100 b. Relative frequency of scores less than 120 ...
August 24, 2011 by Sonia

stats
Question 5 of 10 A z-score of 2.0 is two standard deviations above the mean of the distribution (t). True False I chose answer A The z scores is a ratio of difference to variability (t). True False I chose False Question 6 of 10 Whats the probability that an individual, ...
July 3, 2014 by pls check

statistics
It is known from the records of the City Schools that the standard deviation of Algebra scores is 6.0. A sample of 200 students from the system was taken and was found out that the sample mean score is 75. Previous tests showed the population mean to be 70. Is it safe to ...
September 18, 2011 by pokwang

statistics
how do you get thesampling and confidence intervals for this problem sample scores of 1,2,3,4,5 and 95 percent confidence interval about the sample mean
October 15, 2010 by Inez

statics
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label firstDrawings need not be included in response...
May 3, 2010 by Anonymous

Statistics
True or False The mean for a sample of n = 4 scores has a standard error of 5 points. This sample was selected from a population with a standard deviation of = 20.
December 12, 2013 by Lyndyc

statistics
random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a. what is the probability that the sample mean will have a value between 45 and 55? b. what is the probability that the sample mean will ...
October 15, 2012 by angela

stats
sample was obtained from a population with unknown parameters. scores: 6, 12, 0, 3, 4 compute the sample mean and sandard deviation. compute the estimated standard error for M.
March 27, 2011 by T

statistics
using the 68- 95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard diviation of 20. Use the 68-95-99.7 rult to find the following quantities: percentage of scores less than 100 relative frequency of scores less than 120. ...
August 19, 2010 by margaret

Statistics
Given that a population of scores is normally distriibuted with u=100 and o=8, determine the following: a. The percentile rank of a score of 120 b. The perentage of scores that are below a score of 99 c. The percentage of scores that are between a score of 101 and 122 d. The ...
August 14, 2013 by Grand Canyon University

Math
105 91 82 59 97 72 72 88 81 What is the mode of these scores? A.46 B.72 C.82 D.83 B? 2.The test scores of 1 students are shown below 95 63 78 86 84 86 91 95 72 93 87 74 What is the median score of the 6 highest grades? A.86 B.91 C.92 D.93 C? 3.The test scores of 12 students ...
March 21, 2013 by Jerald

statistics
The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 1. The range of the math scores equals the range of the verbal scores. 2. The...
September 18, 2012 by Gee

statistics
Assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use teh 68-95-99.7 rule to find the following quantities: a. percentages of scores less than 100 b. relative frequency of scores less than 120 c.percentage of scores ...
July 19, 2010 by terry

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, 9, 6, and 7. The mean ...
June 22, 2011 by Liz

statistics
Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first a. (0.1 point) Percentage of scores less...
May 10, 2010 by Rose

statistics
The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an A grade to the top 10% of the scores, a B grade to the next 10% of the ...
March 24, 2013 by Sarah

auguta tech
a. Percentage of scores less than 100=50 percent b. Relative frequency of scores less than 120= 0.34+0.135+0.0235+0.015+0.84 c. Percentage of scores less than 140 d. Percentage of scores less than 80 e. Relative frequency of scores less than 60 f. Percentage of scores greater ...
April 17, 2010 by cynthia

statistics
1. A random sample of n = 16 scores is selected from a normal distribution with a mean of = 50 and a standard deviation of = 10. What is the probability that the sample mean will have a value between 45 and 55? What is the probability that the sample mean will have a value...
May 5, 2011 by jansa

Research and Statistics
5. The table below shows Psychology exam scores, Statistics Exam scores, and IQ scores for a random sample of students. What can you observe in the relationship between IQ and psychology, psychology and statistics, and IQ and statistics? Using a web-calculator, obtain the ...
September 11, 2010 by Moreen

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