uppose that a researcher developed a drug that she claims increases extroversion. A sample of n = 4 participants has a sample mean of M = 115 on a personality assessment after taking the drug. The personality test has a population mean of μ = 100 and σ = 30. Is the sample mean an especially unlikely result based on the population parameters for the personality test? What if the researcher increased the sample to n = 25 and observes the same sample mean of M = 115?
uppose that a researcher developed a drug that she claims increases extroversion. A sample of n = 4 participants has a sample mean of M = 115 on a personality assessment after taking the drug. The personality test has a population mean of μ = 100 and σ = 30. Is the sample mean an especially unlikely result based on the population parameters for the personality test? What if the researcher increased the sample to n = 25 and observes the same sample mean of M = 115?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Suppose that a researcher developed a drug that she claims increases extroversion. A sample of n = 4 participants has a sample mean of M = 115 on a personality assessment after taking the drug. The personality test has a population mean of μ = 100 and σ = 30. Is the sample mean an especially unlikely result based on the population parameters for the personality test? What if the researcher increased the sample to n = 25 and observes the same sample mean of M = 115?
For M = 115 and n = 4 scores:
z =
, which indicates that the sample mean especially unlikely.
For M = 115 and n = 25 scores:
z =
, which indicates that the sample mean especially unlikely.
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