You wish to test if the mean difference of post-test from pre-test is less than 0 (they did worse) at asignificance level of 0.01. For the context of this problem, d = post-pre.You obtain pre-test and post-test samples for na = 20 subjects. The average difference (post-pre) isTd = -6.9 with a standard deviation of the differences of sa = 38.7.Round your answers to three decimal places, and round any interim calculations to four decimal places.Fill in the hypotheses below (click the circle to the left of the correct answer):Hou_dHau_dWhat is the test statistic?-0.797Using your answer from the previous question, find the p-value.0.2176What is the critical value for this test?Hint: Use R.-2.539 X▼ Part 2 of 4Part 3 of 4

we use r to find critical value R input : alpha <- 0.01df <- 19critical_value <-…

Answered: You wish to test if the mean difference…

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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This problem is fill in the blank. Just choose the correct answers. Thank you for your help A scientist has read that the mean birth weight, μ, of babies born at full term is 7.2 pounds. The scientist, believing that μ is less than this value, plans to perform a statistical test. She selects a random sample of birth weights of babies born at full term and finds the mean of the sample to be 6.9 pounds and the standard deviation to be 1.7 pounds. Based on this information, answer the questions below. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test? H0: (choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to. (choose one) 6.9 pounds, 7.2 pounds, or 1.7 pounds. H1: (Choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to. (Choose one) 6.9 pounds, 7.2 pounds, or 1.7 pounds. In the context…
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
Prior to the virus outbreak in Maine, a pound of flour cost 75 cents. You sample 112 grocery stores and find that the average cost is X-bar = 88 9 cents. You want to see if this is significantly higher than the cost before the outbreak, so you test the following hypotheses: Ho: u s 75 and Ha: u > 75. What is the standard error of the mean? Round your answer to three decimal places. In this cents with a standard deviation s = problem, do not convert the cents to decimal format.
A test involving 340 men ages 20 to 24 found that their blood cholesterol levels had a mean of 188 mg/dl and a standard deviation of 44.3 mg/dl. (a) Determine the z-score, to the nearest hundredth, for one of the men who had a blood cholesterol level of 215 mg/dl. (b) The z-score for one man was −1.57. What was his blood cholesterol level? Round to the nearest hundredth.
Suppose the scores on your last Algebra 2 test were normally distributed, with a mean of 81% and a standard deviation of 3%. To show you how you compared to your classmates, the teacher did not record your grades as per- centages, instead, she wrote them as z-scores. You look at your paper and see "2.66" written at the top. What was your score as a percentage? Explain how you determined your answer.
You wish to test if the mean difference of post-test from pre-test is less than 0 (they did worse) at a significance level of 0.01. For the context of this problem, d = post pre You obtain pre-test and post-test samples for na = 20 subjects. The average difference (post-pre) is x = -6.9 with a standard deviation of the differences of s= 38.7. Round your answers to three decimal places, and round any interim calculations to four decimal places. Fill in the hypotheses below (click the circle to the left of the correct answer): Hou_d Ha: μ_d What is the test statistic? 0 0 Part 2 of 4
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. A. How many standard deviations above the mean is your score?
On an intelligence test, the mean number of raw items correct is 236 and the standard deviation is 39. What are the raw (actual) scores on the test for people with IQs of (a) 119, (b) 81, and (c)100? To do this problem, first figure the Z score for the particular IQ score; then use that Z score to find the raw score. Note that IQ scores have a mean of 100 and a standard deviation of 15. (a) What is the raw (actual) score on the test for people with an IQ of 119?
Student Satisfaction sent from average to the 60th percentile (z score = .2533). Dr. Reed wants to know the projected impact on test scores. All she knows is that Student Satisfaction and Student Test scores are correlated at .43 and the current average test score is 81% with a standard deviation of 5%. Show your work

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