The average score that can be obtained on a standardized test at your school is114with a standard deviation of 16. You are a reporter for the school newspaperand you want to know if thetypical deviation, o,Student athletes are different. To find out, he surveys a random sample of 18student athletes and determinesthat for the sample, the mean score is112with a standard deviation of12.If we assume that the scores that the student athletes obtained follow anapproximately normal distribution, is there enough evidence to conclude, at the level of significance of 0.05, which standard deviation is higher among studentathletes?Perform a two-tailed test. Then complete the following.Carry intermediate calculations to three or more decimal places. (If necessary, you can refer to a list of formulas .)(to) Formulate the null hypothesish and the alternative hypothesish 1'ho: 00(b)(c)(d)h !10Determine which type of test statistic to use.(Choose an option)Find the value of the test statistic. (Round to three or more decimal places.)0Find the p-value. (Round to three or more decimal places.)Пμ σ pXI0=0 OSO0#0SXO Carry intermediate calculations to three or more decimal places. (If necessary, you can refer to a list of formulas .)(to) Formulate the null hypothesish and the alternative hypothesishho: 00(b)(c)(d)h :01Determine which type of test statistic to use.(Choose an option)Find the value of the test statistic. (Round to three or more decimal places.)Find the p-value. (Round to three or more decimal places.)01'(and) Can we conclude that the standard deviation of the scores that the studentathletes obtained is greater than16?O Yeah O NoμX0=0SX☐#0 0<0р0

Sample size n =18Standard deviation s=12NOTE:- According to bartleby guidelines expert can solve…

Answered: average score that can be obtained on a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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It seems these days that college graduates who are employed full-time work more than 40-hour weeks. Data are available that can help us decide if this is true. A survey was recently sent to a group of adults selected at random. There were 15 respondents who were college graduates employed full-time. The mean number of hours worked per week by these 15 respondents was 43 hours, with a standard deviation of 8 hours. Assume that the population of hours worked per week by college graduates employed full-time is normally distributed with mean μ. Can we conclude that μ is greater than 40 hours? Use the 0.05 level of significance. State the null hypothesis H0 and the alternative hypothesis H1 Find the t-test df & Solve the t-test value Find the critical value Can we conclude, at the 0.05 level of significance, that the mean number of hours worked per week by college graduates is greater than 40 hours? Yes or No?
The mean score of a statistics exam of class A is 75 with a standard deviation of 13 while class B has a mean score of 86 with a standard deviation of 16. Which class performed better? Why?
What percent of the students received a score below 64, if the mean grade on a test was 70 and the standard deviation was 6. For the same test results as prob 1), what percent of studen ts scored between 64 and 80 .
The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30. Find the score that is 2 1/2 standard deviations above the mean.
When engaging in weight-control (fitness/fat burning) types of exercise, a person is expected to attain approximately 60% of his or her maximum heart rate. For 20-year-olds, this rate is approximately 120 bpm. A simple random sample of one hundred 20-year-olds was taken, and the sample mean was found to be 107 bpm, with a standard deviation of 45 bpm. Researchers wonder if this is evidence to conclude that the expected level is actually lower than 120 bpm. To determine this, we test the following hypotheses: Ho: H= 120 versus H₂ μ< 120 Suppose the mean and standard deviation obtained were based on a sample of size 25 rather than 100.
The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. Your friend took the same exam, but in a different section (section B) of the class. The mean for that section was 70, with a standard deviation of 6. Your friend scored 73 on the exam. What is their z-score?
The first statistics exam had a mean of 71 and a standard deviation of 11 points; the second had a mean of 84 and a standard deviation of 7 points. Anna scored a 84 on both tests. Megan scored 88 on the first exam and 80 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain. The total of Anna's z-scores is 0.6, which is greater than Megan's total of 1 (Round to one decimal place as needed.) 14 14 14. 143 144 145 146 147
The results of a common standardized test used in psychology research is designed so that the population mean is 175 and the standard deviation is 20. A subject earns a score of 227. What is the z-score for this raw score? Do not round your answer.z-score = ?
Sam and Peter are classmates. In an examination, Sam gets 75 marks and Peter gets 89 marks. It is known that the standard normal score of Sam's marks is 0, z(Sam) = 0 and the standard normal score of Peter's marks is 1.75, z(Peter) = 1.75. Find the standard deviation of the examination marks.
The results of a common standardized test used in psychology research is designed so that the population mean is 175 and the standard deviation is 10. A subject earns a score of 183. What is the z-score for this raw score?
Raul received a score of 77 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 75 on a biology test for which the class mean was 70 with standard deviation 4. On which test did he do better relative to the rest of the class
I'm a bit confused about how to solve this (any help is appreciated)

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