With a Mean of 40 and an SD of 20

question 55

Short Answer

With a mean of 40 and an SD of 20.45, what is the probability of selecting at random a score of 45 or higher?

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Definitions:

Chi-Square Tests

Statistical tests used to determine if there is a significant difference between the expected frequencies and the observed frequencies in one or more categories.

Test Statistic

A value calculated from sample data used to evaluate the credibility of a hypothesis about a population.

Expected Frequency

The predicted number of times an event is anticipated to occur within a specified period based on probability.

Chi-Square Test

A statistical method used to determine if there is a significant association between two categorical variables.