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A sample of n = 4 individuals is selected from a population with a mean of μ = 40. A treatment is administered to the individuals in the sample and. after treatment, the sample has a mean of M = 44 and a variance of s 2 = 16. a. Is this sample sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05. b. If all other factors are held constant and the sample size is increased to n = 16, is the sample sufficient to conclude that the treatment has a significant effect? Again, use a two-tailed test with α = .05.

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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570
BuyFind

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

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Chapter
Section
Chapter 9.2, Problem 1LC
Textbook Problem

A sample of n = 4 individuals is selected from a population with a mean of μ = 40. A treatment is administered to the individuals in the sample and. after treatment, the sample has a mean of M = 44 and a variance of s2 = 16.

a. Is this sample sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05.

b. If all other factors are held constant and the sample size is increased to n = 16, is the sample sufficient to conclude that the treatment has a significant effect? Again, use a two-tailed test with α = .05.

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