Fill in the Blanks by Standardizing the Normally Distributed Variable

question 67

Multiple Choice

Fill in the blanks by standardizing the normally distributed variable.
-Dave drives to work each morning at about the same time. His commute time is normally distributed with a mean of 42 minutes and a standard deviation of 8 minutes. The percentage of
Time that his commute time lies between 18 and 58 minutes is equal to the area under the standard
Normal curve between ___ and ___.

• A)-3.5, 1.5
• B)-2.5, 2.5
• C)0, 1
• D)-3, 2

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Definitions:

Significance Level

A statistical term that determines the threshold at which a null hypothesis is rejected.

Wilcoxon Signed-Rank Test

A statistical test used for comparing two related samples to determine if their population means rank differ.

Dependent Samples

Two or more groups of observations where the individuals or items in one group are related or matched to those in the other groups.

T-Test

A statistical test used to compare the means of two groups or to compare a sample mean with a known value when the sample size is small and the population variance is unknown.