Question: Hello, Looking for guidance: 7. A normal population has a mean of = 100. A sample of N = 36 is selected from the population,

Hello,

Looking for guidance:

7. A normal population has a mean of = 100. A sample of N = 36 is selected from the population, and a treatment is administered to the sample. After treatment, the sample mean is computed to be = 106.

a. Assuming that the population standard deviation is = 12, use the data to test whether or not the treatment has a significant effect. Use a z test with = .05

b. Repeat the z-Test, but this time assume that the population standard deviation is = 30.

c. Compare the results from part a and part b. How does the population standard deviation influence the outcome of a z-test?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Please use the information below to answer the question. A random sample of 36 scores is selected from a normal population with a mean of mu equal to 25. After a treatment is administered to the...

In a survey of 1,000 people, 420 are opposed to the tax increase. Construct a 90 percent confidence interval for the proportion of those people opposed to the tax increase. A. [.394 .446] B. [.380...

1. A sample has a mean of M=100, and standard deviation of S=10. Find the z score for each of the following X values from this sample. A. X=90 B. X=60 C. X=120 D. X=105 E. X=40 2. A random sample of...

A random sample of n = 36 scores is selected from a normal population with a mean of = 60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 52....

10. A random sample of n 36 scores is selected from a normal population with a mean of 60. After a treatment is administered to the individuals in the sample, the sample mean is found to be M 52. a....

A normal population has a mean of 75 and a standard deviation of 7. You select a sample of 38. Use Appendix Bel for the zvalues. Compute the probability that the sample mean is: (Round the z-values...

Statistics Chapter 6, 7 & 9 Lind, Statistical Techniques and Economics 1. Industry standards suggest that 9 percent of new vehicles require warranty service within the first year. Jones Nissan in...

Assignment Content Question 1100 Points CHAPTER 7: PROBABILITY AND THE DISTRIBUTION OF SAMPLE MEANS DO PAGES221-222:# 6, 9, 11, 15, 16, 17 - SHOW ALL WORK,DON'T JUST SHOW ANSWERS Due Sunday 5:00 pm...

14. A random sample of n = 9 scores is selected from a normal population with a mean of p = 100. After a treatment is administered to the individuals in the sample, the sample mean is found to be M =...

"Analyzing the Financial Statement Using Horizontal-Vertical Analysis to Evaluate the Company's Financial Performance Period 2012-2016." The authors provide four charts to visually summarize their...

Fino Linens Inc. manufactures bed and bath linens. The bath linens department sews terry cloth into towels of various sizes. Fino uses the weighted average method. All materials are added at the...

E9.32 Consider the system described in state variable form by where x(t) = Ax(t) + Bu(t) y(t) = Cx(t) A 0 - [14 11]. B = [3,2]. C = 12 0]. -4 Compute the phase margin.

On 1 March 2007 DB Limited issued R560 000 15% debentures at R98. The debentures were to be redeemed at par in four equal annual payments starting 28 February 2010. Required: Journalise the above...