# Statistics-- help needed despertaly!!!!!!

19,165 results

### statistics

explain clearly the three meaning of "statistics" contained in the statement below "you compute statistics from statistics by statistics"

### Statistics-- help needed despertaly!!!!!!

McMaster University researchers Margo Wilson and Martin Daly showed 209 male and female students pictures of attractive and not-so-attractive people of the opposite sex. Each was then offered a chance to win a prize. They could accept a check for between $15 and $35 tomorrow ...

### m/c

Which of the following refers to when a researcher gathers data from a sample and uses the statistics generated to reach conclusions about the population from which the sample was taken? inferential statistics holistic statistics conclusive statistics descriptive statistics is...

### Statistics

Assume that a random sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. 95% confidence the sample size is 2096 of which 25%are successes The margin of E= (round to four decimal places ...

### Statistics

Find the minimum sample size n needed to estimate u for the given values of c, s, & E. c=0.98, s=6.5, & E=1.?

### Statistics

How large a smaple from a N(80,20) population is needed so that the sampling distribution of the mean has a standard deviation of 1?

### Statistics

How large a sample from N(80,20) population is needed so that the sampling distribution of the mean has a standard deviation of 1?

### Statistics

How large a sample of U.S. adults is needed in order to estimate U with a 95% confidence interval of length 1.2 hours?

### Speech- Statistic needed

Does anyone know of any websites that have statistics on the number of people that volunteer for disaster relief in the us?

### statistics

how large a sample size is needed for 2 sided 95% confidence interval to have a length of 2 weeks when mean is 3.6

### Statistics

About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p<.05?

### math

Draw a venn diagram to illustrate the following. In a shop 50 cars were inspected and it found that 23 needed new brakes and 34 needed new tires. 3 needed no services at all how many needed new brakes and new tires? How many only needed brakes? Please help

### statistics

Find the indicated critical value. z 0.04 Round to two decimal places as needed. My answer is 1.75 what do guys think.

### Statistics

What sample size is needed to find the percent of the customers at a store that are married, if 90% confidence is desired to be within a 5% margin of error?

### statistics

Use the margin of error E = $10, confidence level of 99%, and ó = $40 to find the minimum sample size needed to estimate an unknown population mean, .ì

### Statistics

What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721

### Statistics

What critical t value would be needed to construct a 90% confidence interval on a sample of size 22? 1.717 1.323 2.080 1.321 1.721

### Statistics

As the sample size gets larger, what happens to the size of the correlation that is needed for significance?

### statistics

Statistics play s a major role in the health care field in today's environment. Please provide how statistics can be important and influential in the nursing profession. Provide at least two examples where you ahve observed statistics to contribute positively to the needs of ...

### statistics

9. Explain the transformation needed to convert the following data to a linear data set. {(1, 0.98), (2, 1.39), (3, 1.71), (4, 1.98), (5, 2.22), (6, 2.43)} (6 points)

### 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 ...

### statistics

sample size needed with a mean of 100,standard deviation of 20 for the the population of normal adults an iq range to fall between 2 iq points with 95% confidence interval

### Statistics

Suppose x is a uniform random variable with values ranging from 40 to 60. Find the probability that a randomly selected observation exceeds 54. *** Im not sure how to do this. I thought I needed a standard deviation.

### Statistics

What is an example of a research problem at your organization that would benefit from the use of either descriptive statistics or probability distribution statistics?

### statistics

It takes approximately 15 minutes to code one record. How many personnel hours would be needed to code 1,424 discharges for the month?

### Statistics

It takes approximately 15 minutes to code one record. How many personnel hours would be needed to code 1,424 discharges for the month?

### Statistics

It takes approximately 15 minutes to code one record, How many personnel hours would be needed to code 1,424 discharges for the month?

### Statistics

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44

### Statistics

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44

### Algebra- word problem

Jordan has a photograph on his wall that is 3 in. long and 6 in. wide. He takes it to be framed which increases the length and width by 2 in. each. How does getting the picture framed change the amount of wall space needed? My choice is B- Correct?? Choices A. the wall needed ...

### Healthcare Statistics

It takes approximately 15 minutes to code one record. How many personnel hour would be needed to code 1424 discharges for the month.

### Statistics

)The random sample shown below was selected from a normal distribution Complete parts (a) and (b). Construct a 99% confidence interval for the population mean u. Round to two decimal places as needed.

### statistics anova

a professor is interested in whether there is a differnce in counseling student's statistics competency scores among 1) those who have never taken any statistics ourse, 2) those who have only taken an undergraduate statistics course, 3)

### chemistry 2

You are instructed to create 800. mL of a 0.69 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. what is the molarity needed for the acid component of the buffer?What is the molarity needed for the base ...

### Health

1. What is needed to make blood cells? 2. What pair of workers is needed to produce estrogen? 3. What is needed to produce eleven hormones that control the actions of other endocrine glands? 4. What is needed to pass oxygen from lungs into blood vessels and welcome carbon ...

### statistics

A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 99% confidence level, what size of sample is needed?

### statistics

A researcher wishes to estimate the proportion of adults living in rural areas who own a gun. He wishes to achieve a margin of error of 2.8%. What is the minimum sample size needed?

### statistics

consider a stanley cup playoff series in which the toronto maple leafs hockey team faces the ottawa senators. toronto hosts the first, second and if needed fifth

### statistics

Assume that adults have IQ score that are normally distributed with a mean of 105 and a standard deviation 20. Find P, which is the IQ score separating the bottom 10% from the top 90%. Round to the nearest hundredth as needed.

### statistics

conduct a study on support of ban on smartphones in class. 68/87 said yes. How large of a sample is needed to be sure the margin of error +/- 3.5% with 99% confidence. I know this is estimation...but I am not sure how to go about solving this problem.

### statistics

How large a sample is needed to be able to estimate the proportion to within plus or minus 3% and be 95% sure the estimate is correct? frame contains approximately 25,000.do not take nonresponse into account.

### Statistics

In the following question, identify which choices would be considered inferential statistics and which would be considered inferential statistics. 1. of 500 randomly selected people in new york city, 210 people had O+ blood. a) "42 percent of the people in NYC have O+ blood" ...

### writing

Which of the following statements is not a general rule for using statistics in a classroom speech? A The more statistics the better. Use statistics sparingly Make sure information is up to date Round off long numbers.

### statistics

If you want to be 95% confident of estimating the population proportion to within a sampling error of and there is historical evidence that the population proportion is approximately 0.40, what sample size is needed?

### statistics

A researcher wishes to estimate with 95% confidence the proportion of adults who have high speed internet access. Her estimate must be accurate within 4% of the true proportion. 1. Find the minimum sample size needed using a prior study that found that 48% of the respondents ...

### statistics

a simple random sample will be obtained from a normally distributed population. find the minimum sample size needed to be 95% confident that the sample standard deviation (s) is within 10% of sigma. please help!

### statistics

For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested. a. What is the minimum score needed to be in the bottom 10% of the distribution? b. What scores form the boundaries for the middle 75% of the distribution.

### Statistics

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n=500, x=350, 90% confidence ?<p<? (Round to three decimal places as needed.)

### statistics

The cutoff "t" needed is -1.8333. The standard deviation of the distribution of means of change scores is 2.0 and the mean change score for the sample studied is an increase of 5.2. What is the t score?

### 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 ...

### Statistics

About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p < .05? Predicted Effect Size Tails (a) Medium Two (b) Large One (c) Small One

### Statistics

About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p < .05? Predicted Effect Size Tails (a) Medium Two (b) Large One (c) Small One

### Algebra ll

Cleopatra was needed barge workers, and when the word went out 175 workers showed up, that is 21/2 times the amount needed. How many workers were originally needed? (I am trying to help my niece with her homework, and we live 600 miles apart. Can you explain to me how to get ...

### math

• what is statistics • Perspective statistics • inferential statistics • Data statistics • Example of a Quantitative data • Example of a Qualitative data • What is population •what are the different scale of measurement • what are the different ways/method to...

### statistics

A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is needed to get the desired information to be accurate within 0.68 ...

### statistics

A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200?

### Psychology

An essential part of scientific thinking is not only how to use statistics correctly, but also how to identify the misuse of statistics. Our textbook authors suggest that students should: Answer distrust all statistics because they convey a false impression of certainty and ...

### statistics

We guess, based on historical data, that 30% of graduating high-school seniors in a large city will have completed a first-year calculus course. What's the minimum sample size needed to construct a 95% confidence interval for a proportion with a margin of error of 2.5%?

### statistics

confidence intervals: A researcher is interested in estimating the average salary of teachers in a large school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200.

### Statistics

A private opinion poll is conducted for a politician favors decriminalizing marijuana possession. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 2%.

### statistics

I am conducting a study on support of ban on smartphones in class. 68/87 said yes to the ban. How large of a sample is needed to be sure the margin of error +/- 3.5% with 99% confidence. I know this is estimation...but I am not sure how to go about solving this problem.

### Basic Statistics

A researcher is interested in estimating the average salary of police officers in a large city. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050,how large a sample is needed to get the desired information and to be accurate within...

### statistics

A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviation is 4.02, how large a sample is needed to get the desired information to be accurate within 0.58 ...

### statistics and probability

n a written test given to a large class comprising 42 students, the test scores were found to be normally distributed with a mean of 78 and a standard deviation of 7. A minimum score of 60 was needed to pass the test. A score of 90 or greater was needed to earn an A in the ...

### statistics

We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 40 students from the population. If the true percentage is really 77%, find the probability of observing 39...

### Chemistry please help!

Please help. I have no idea how to do these 4 homework problems. 1- How many milliliters of 0.140 M HCl are needed to completely neutralize 42.0mL of 0.106 M Ba(OH)2 solution? 2-How many milliliters of 0.123 M H2SO4 are needed to neutralize 0.250 g of NaOH ? 3-If 55.2 mL of ...

### statistics

A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the tgrue proportion by more than 4%?

### Statistics

A researcher wishes to estimate, with 95% confidence, the proportion of adults who have high-speed internet access. Her estimate must be accurate within 4% of the true proportion. A) Find the minimum sample size needed, using a prior study that found that 54% of the ...

### statistics

The distribution of scores on a standardized aptitude test is approximately normal with a mean of 490 and a standard deviation of 95. What is the minimum score needed to be in the top 25% on this test? Carry your intermediate computations to at least four decimal places, and ...

### statistics for health research

Descriptive statistics are widely used in qualitative research. When establishing if a population is normally distributed explain when the statistics of sample size, mean, mode, median, skewness and kurtosis will guide the researcher to make conclusions of a normal distribution.

### Statistics

A doctor want to estimate the HDL cholesterol of all 20- to 29- year old females. how many subjects are needed to estimate the HDL cholesterol within 3 points with 99% confindence assuming s=15.8 based on earlier studies?

### 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 considered for admission?

### Statistics

1. of 500 randomly selected people in new york city, 210 people had O+ blood. a) "42 percent of the people in NYC have O+ blood" Is the statement descriptive statistics or inferential statistics? b) "58 percent of the people in NYC do not have type O+ blood" Is the statement ...

### statistics

The following list is a sampling of the costs of various statistics textbooks used at several colleges. Give the upper confidence limit for a 95% confidence interval estimate for the mean cost of all statistics textbooks. 109.95; 92.00; 96.70; 84.85; 92.60; 84.45; 90.95; 77.00...

### statistics

In a preliminary study, the sample standard deviation for the duration of a particular back pain suffered by patients was 18.0 months. How large a random sample is needed to construct a 90% confidence interval so that an estimate can be made within 2 months of the actual duratio

### statistics page on jiskha

Does anyone find the picture as funny as I do? http://www.jiskha.com/math/statistics/ It's a baby holding a statistics textbook.

### AP Statistics

We guess, based on historical data, that 30% of graduating high-school seniors in a large city will have completed a first-year calculus course. What's the minimum sample size needed to construct a 95% confidence interval for a proportion with a margin of error of 2.5%? 1537 ...

### statistics

A university wants to estimate the average distance that commuter students travel to get to class with an error of ±3 miles and 90 percent confidence. What sample size would be needed, assuming that distances are normally distributed with a range of X = 0 to X = 50 miles, and...

### statistics

You are a travel agent and wish to estimate, with 98% confidence, the proportion of vacationers who use an online service or the Internet to make travel reservations. Your estimate must be accurate within 4% of the population proportion. a) No preliminary estimate is available...

### physics multiple choice

A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present. What force is needed to push this crate along the same floor at a constant speed 3V if friction is the same as before? A. A constant force 3F is needed. B. A force...

### physics multiple choice

A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present. What force is needed to push this crate along the same floor at a constant speed 3V if friction is the same as before? A. A constant force 3F is needed. B. A force...

### Statistics

Of 500 randomly selected people in new york city, 210 people had O+ blood. "58 percent of the people in NYC do not have type O+ blood" Is the statement descriptive statistics or inferential statistics?

### Math

The force E needed to make a machine pull a load is partly constant and partly varies as the load L to be pulled.For a load of 20kg the force needed is 14N while 20N is needed for a load of 30kg find: a)The formula connecting E and L. b)E when L=50kg

### Statistics

3. A professor is interested in whether there is a difference in counseling students’ statistics competency scores among 1) those who have never taken any statistics course, 2) those who have only taken an undergraduate statistics course, 3) those who have taken COUN 503, ...

### chemistry

what is the number of grams needed to prepare a 1.23 M solution of nitric acid if 250.0 mL are needed?

### Chemistry help needed

How many milligram of lysozyme (MW=14,600 g/mol) are needed to make 3 liters of a 10^-6 M solution?

### Chemistry..

A chemical engineer calculated that 15.0 mol H2 was needed to react with excess N2 to prepare 10.0 mol NH3. But the actual yield is 60.0% . Write a balanced chemical equation for the reaction. Is the amount of H2 needed to make 10.0 mol NH3 more than, the same as, or less than...

### Introduction to statistics

A researcher would like to estimate the population proportion of adults living in a certain town who have at least a high school education. No information is available about its value. How large a sample size is needed to estimate it to within 0.19 with 99% confidence? n= (...

### Finance

If a corporation wanted to guarantee its long term costs of financing an investment project, it could: a.) sell t-bill futures for when the funds were needed b.) buy t-bill futures for when the funds were needed c.) sell t-bond futures for when the funds were needed d.) buy t-...

### statistics

12. A statistics student received a grade of 85 on a statistics midterm. If the corresponding z score equaled +1.50, and the standard deviation equaled 7, what was the average grade on this exam? a. 95.5 b. 74.5 c. 78.0 d. Cannot determine without knowing how many took the ...

### Elementary Statistics

determine whether the given is a statistics or parameter. 1.) There are 50 capitol states in the US. Answer: Parameter 2.) Among the flights included in the sample of flights in Data set 15 in Appendix B, 21% arrived late. Answer: Statistics

### statistics

A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050 (σ = 1050), how large of a sample is needed to be accurate within $200...

### statistics

On this semesters final exam, john scored 72 on his calculus exam and 53 on his statistics exam. The z score for both exams was the same. Which on would he do better on? a. calculus b.statistics c. the exam scores are equivalent

### statistics

On this semesters final exam, john scored 72 on his calculus exam and 53 on his statistics exam. The z score for both exams was the same. Which on would he do better on? a. calculus b.statistics c. the exam scores are equivalent

### math

A small business just leased a new computer and color laser printer for three years. The service contract for the the computer offers unlimited repairs for a fee of $100 a year plus a $25 service charge for each repair needed. The company's research suggested that during a ...

### statistics

Computer Services wants to estimate the mean number of hours college students use on campus computers each day. They want to be within .1 hour of the true value with 99% confidence. From a previous study, the standard deviation is assumed to be .6 hour. What size sample is ...

### statistics

An aircraft is equipped with three engines that operate independently. The probability of an engine failure is .01. What is the probability of a successful flight if only one engine is needed for the successful operation of the aircraft?

### chemistry

a student needed 1000 ml of a 0.10 buffer of ph 4.0. calculate the amount of sodium acetate and acidic acid needed for this solution

### Statistics

The null hypothesis is: a. Always contains a > in the equation b. Not needed c. The alternative hypothesis d. The hypothesis of no difference e. Always contain a < in the equation