You wish to test the following claim (\( H_a \)) at a significance level of \( \alpha = 0.05 \). For the context of this problem, \( d = \text{post} - \text{pre} \) where the first data set represents a pre-test and the second data set represents a post-test.\[H_0: \mu_d = 0\]\[H_a: \mu_d > 0\]You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for \( n = 44 \) subjects. The average difference (post - pre) is \( \bar{d} = 4.2 \) with a standard deviation of the differences of \( s_d = 25.5 \).**What is the test statistic for this sample?** (Report answer accurate to three decimal places.)test statistic = \[ \text{__________} \]**What is the p-value for this sample?** (Report answer accurate to four decimal places.)p-value = \[ \text{__________} \]

Answered: Image /qna-images/answer/0b1a423f-875c-4cef-a53c-514754af375e.jpg

Answered: You believe the population of…

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 psychologist is studying the self-image of smokers, as measured by the self-image (SI) score from a personality inventory. She would like to examine the mean SI score, μ, for the population of all smokers. Previously published studies have indicated that the mean SI score for the population of all smokers is 85 and that the standard deviation is 10, but the psychologist believes that the value for the mean has increased. She plans to perform a statistical test. She takes a random sample of SI scores for smokers and computes the sample mean to be 95. Based on this information, answer the questions below. 1. 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) 85, 95, or 10. H1: (Choose one) less than,…
Scores on an exam were normally distributed. Ten percent of the scores were below 60.0 and 80% were below 81. Find the mean and standard deviation of the scores. (Round the final answer for the mean to two decimal places.) (Round the final answer for the standard deviation to four decimal places.)
ppose that the distribution of scores on an exam can be described by a normal curve with mean 100. The 16th percentile of this distribution is 70. (Use the Empirical Rule.) a) What is the 84th percentile? (b) What is the approximate value of the standard deviation of exam scores? (c) What z score is associated with an exam score of 145? (d) What percentile corresponds to an exam score of 160? 0.15 0.3 2.5 O 13.5 34 50 68 86.5 0 97.5 99.7 99.85 ---Select--- 0.15% 0.3% 2.5% 13.5% 34% 50% 68% 86.5% 97.5% 99.7% 99.85% (e) Do you think there were many scores below 10? Explain. standard deviations below the mean, and so the percentage of scores below 10 would be approximately -Select-- A score of 10 is
The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
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…
I'd like the first question answer, the one that fills in the boxes. I can do the rest
コ, ● Question 17 A distribution of values is normal with a mean of 139.3 and a standard deviation of 37.8. Find P. which is the score separating the bottom 64% from the top 36%. 64 PeA Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z or z-scores rounded to 3 decimal places are accepted.
Cereals sodium values have a mean of 167 and a standard deviation of 77.3. Find the z-score for the cereal that has a sodium value of 0. How would you interpret this z-score?
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