TABLE 7-2 The Time Spent Studying by Students in the Week Before

question 71

Short Answer

TABLE 7-2
The time spent studying by students in the week before final exams follows a normal distribution with a standard deviation of 8 hours. A random sample of 4 students was taken in order to estimate the mean study time for the population of all students.
-Referring to Table 7-2, what is the probability that the sample mean is more than 3 hours below the population mean?

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Definitions:

ANOVA F Test

A statistical test used in analysis of variance (ANOVA) to determine if there are significant differences between the means of three or more groups.

Explanatory Variables

Variables in a statistical model that are used to explain variations in the dependent variable.

Multiple Regression

A statistical technique used to predict the outcome of a dependent variable based on multiple independent variables.

Hypotheses

Hypotheses are formulated statements that present a proposed explanation to some phenomena, which can be tested through further investigation and experimentation.