Let X de a normally distributed variable with a population standard deviation = 43. A research believe that the standard deviationshould increase when a new variable is manipulated. To test their claim, the research collects a sample of size n = 19 and finds asample statistic of 8 = 53. Use the x²-table to find the largest value that the corresponding P-value can be.Type your answer...

Let be the population variance.Given that,Population variance Sample size Sample variance Assume…

Answered: should increase when a new variable is…

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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#1
A claim is made that the proportion of children who play sports is 0.563, and the sample statistics include 1,244 subjects with 31% saying that they play a sport. Find the z value. (Round final answer to four decimal places)
Please answer the question on the attachment.
For a sample with a standard deviation of s = 12, a score of X = 42 corresponds to z = –0.50. The mean for the sample is M = ___. a. 48 b. 45 c. 40 d. 36
Q.1 Dr. Star is interested in whether the physical coordination skills among low-income pre-school children are different from those of other children. She knows the population mean for the Pre- School Coordination Activity Test (PCAT) is 120 with o x= 10. She tests 80 preschoolers from low-income families and obtains an X= 122. a. Should Dr. Star do a one-tailed or a two-tailed test? Explain your answer. b. State the appropriate H o and H a , given your answer in part a. c. Use at a = 0.05. What is the value of zcrit ? d. Calculate z obt e. Using symbols, report your findings. f. What should Dr. Star conclude?
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The population mean will always be the same as the mean of all possible X that can be computed from samples of size 38. O True O False
Only need answers for D and E thank you.
The next five questions refer to the following scenario: • sample mean T = 10 • sample size n = 100 • population standard deviation O = 4
I need help with #15
Still need D , E and F

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should increase when a new variable is manipulated. To test their claim, the research collects a sample of size n = 19 sample statistic of s = 53. Use the x²-table to find the largest value that the corresponding P-value can be. Type your answer....