The Scores on a Certain Test Are Normally Distributed with a Mean

question 55

Multiple Choice

The scores on a certain test are normally distributed with a mean score of 53 and a standard deviation of 5. What is the probability that a sample of 90 students will have a mean score of at
Least 53.527?

• A) 0.3174
• B) 0.8413
• C) 0.3413
• D) 0.1587

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Definitions:

Regression Line

A line that best fits the data points on a scatter plot, showing the relationship between the independent and dependent variables.

Regression Analysis

A statistical method for investigating and modeling the relationship between variables, often between one dependent and one or more independent variables.

Dependent Variable

A variable in scientific research or statistical analysis that changes in response to the variation of an independent variable.