Question

A random sample of 12 high school seniors took a standardized mathematics test and made scores:...

A random sample of 12 high school seniors took a standardized mathematics test and made scores: 78, 78, 65, 77, 65, 81, 83, 59, 76, 75, 83, 59 Past scores at the same high school have been Normally distributed with LaTeX: \sigma σ =9.3 Is this sample evidence at the α =0.01 level that the average test score for all students is less than 75? State the hypotheses and calculate a test statistic and P-value in order to answer the question.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Scholastic Aptitude Test (SAT) mathematics scores of a random sample of 500 high school seniors in...
Scholastic Aptitude Test (SAT) mathematics scores of a random sample of 500 high school seniors in the state of Texas are collected, and the sample mean and standard deviation are found to be 501 and 112, respectively. Find a 99% confidence interval on the mean SAT mathematics score for seniors in the state of Texas.
Test C is a standardized test that all high school seniors take. In an SRS of...
Test C is a standardized test that all high school seniors take. In an SRS of 28 seniors, the sample standard deviation is 16. A high school counselor hypothesizes that the mean score on Test C for all high school seniors is 59. Here are the null and alternative hypotheses: H0 : µ = 59 H1 : µ not equal to 59 (a) How far (in points) above/below 59 would the sample mean have to be to reject the null...
A random sample of high school seniors took a literacy test before graduation. A comparison of...
A random sample of high school seniors took a literacy test before graduation. A comparison of scores for the test showed that women scored significantly higher on average (p-value = 0.017) than men on the literacy test. What does the p-value in this statement tell us? If there were actually no difference in the mean literacy scores for all men and women at the high school, the probability of observing a difference between the two group means as large or...
Past experience indicates that the time required for high school seniors to complete a standardized test...
Past experience indicates that the time required for high school seniors to complete a standardized test is a normal random variable with a standard deviation of 88 minutes. Test the hypothesis that sigma equals 8σ=8 against the alternative that sigma less than 8σ<8 if a random sample of the test times of 2323 high school seniors has a standard deviation s equals 6.18s=6.18. Use a 0.050.05 level of significance.
6.18 ACT scores of high school seniors. The scores of your state’s high school seniors on...
6.18 ACT scores of high school seniors. The scores of your state’s high school seniors on the ACT college entrance examination in a recent year had mean m 5 22.3 and standard deviation s 5 6.2. The distribution of scores is only roughly Normal. (a) What is the approximate probability that a single student randomly chosen from all those taking the test scores 27 or higher?(b) Now consider an SRS of 16 students who took the test. What are the...
The mean quantitative score on a standardized test for female​ college-bound high school seniors was 550...
The mean quantitative score on a standardized test for female​ college-bound high school seniors was 550 The scores are approximately Normally distributed with a population standard deviation of 50 A scholarship committee wants to give awards to​ college-bound women who score at the 96TH percentile or above on the test. What score does an applicant​ need? Complete parts​ (a) through​ (g) below.The mean quantitative score on a standardized test for female​ college-bound high school seniors was 550 The scores are...
The state test scores for 12 randomly selected high school seniors are shown on the right....
The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts​ (a) through​ (c) below. Assume the The state test scores for 1212 randomly selected high school seniors are shown on the right. Complete parts​ (a) through​ (c) below. Assume the population is normally distributed. 1430 1228 988 695 724724 830 722 750750 546 627 1447 943 the state test scores for 12 randomly selected high school seniors are shown on the right....
At a large company, the attitudes of workers are regularly measured with a standardized test. The...
At a large company, the attitudes of workers are regularly measured with a standardized test. The scores on the test range from 0 to 100 with higher scores indicating greater job satisfaction. The mean score over all the company’s employees was 74 with a standard deviation of 8. A few years ago, the company adopted a telecommuting policy in which workers could spend one work day per week working from home. Recently, a SRS of 40 telecommuters had the following...
A random sample of 64 second-graders in a certain school district are given a standardized mathematics...
A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.21. Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute the p-value. Round to four decimal places.
A group of high school seniors took a scholastic aptitude test. The resulting math scores had...
A group of high school seniors took a scholastic aptitude test. The resulting math scores had a mean 517.7 with a standard deviation of 173.2​, verbal scores had a mean 499.8 with a standard deviation of 130.8​, and the correlation between verbal and math scores was r=0.574. Answer the questions below. ​a) What is the​ correlation? The correlation is _ ? ​(Round to three decimal places as​ needed.) ​b) Write the equation of the line of regression predicting verbal scores...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT