Answered: 5.22a: What is the effect on the power… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 9PPS

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i need mcq answer other pic is for reference

5.21 A study was conducted of 90 adult male patients following a new treatment for congestive
heart failure. One of the variables measured on the patients was the increase in exercise capacity
(in minutes) over a 4-week treatment period. The previous treatment regime had produced
an average increase of u = 2 minutes. The researchers wanted to evaluate whether the new
treatment had increased the value of u in comparison to the previous treatment. The data yielded
ỹ = 2.17 and s = 1.05.
a. Using a = .05, what conclusions can you draw about the research hypothesis?
b. What is the probability of making a Type II error if the actual value of u is 2.1?
5.22 Refer to Exercise 5.21. Compute the power of the test PWR(ua) at pa = 2.1, 2.2, 2.3, 2.4,
and 2.5. Sketch a smooth curve through a plot of PWR(Ha) versus pa.
a. If a is reduced from .05 to .01, what would be the effect on the power curve?
b. If the sample size is reduced from 90 to 50, what would be the effect on the
power curve?

QUESTION 6
5.22a: What is the effect on the power curve?
Hint: See L-11 pdf and lecture, page 9-10
O 1. Depending on u, the power both increases and decreases
O II. The power is unchanged
O III. It increases the power of the test
O IV. It reduces the power of the test

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