An Article in a Professional Journal Reports the Z­score for the Study's

question 44

Short Answer

An article in a professional journal reports the z­score for the study's sample mean was -1.4.The authors also reported their sample mean was 97 with a sample size of 49 and the population mean was 102.However, they did not give the population standard deviation.What was their population standard deviation?

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Definitions:

Alternative Hypothesis

A statement in hypothesis testing that proposes a significant difference or effect, contradicting the null hypothesis.

Statistical Evidence

Data and information gathered from statistical analyses that support or reject hypotheses, used to make conclusions or inferences about the characteristics of populations.

P-Value

The probability of obtaining test results at least as extreme as the results observed, assuming that the null hypothesis is correct.

Alpha (α)

In hypothesis testing, the threshold probability for incorrectly rejecting the null hypothesis, representing the level of significance of the test.