Which of the Following Is True Regarding the Normal Distribution

question 78

Multiple Choice

Which of the following is true regarding the normal distribution?

• A)The mean,median,and mode are all equal.
• B)It has two modes.
• C)It is asymmetrical.
• D)The points of the curve meet the x-axis at z = −3 and z = 3.

Calculate and interpret z-scores for individual data points within a normal distribution.

Apply the empirical rule to estimate the percentage of data within specific ranges of a normal distribution.

Determine the percentage of data above, below, or between certain values in a normal distribution using standard normal distribution tables or calculations.

Apply knowledge of normal distributions to real-world examples involving human characteristics and behaviors.

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Definitions:

Null Hypothesis

A hypothesis that suggests there is no significant difference or effect, serving as a default position until evidence suggests otherwise.

Statistical Significance

A determination that a relationship between variables or a difference between groups is likely not due to chance, based on a predetermined threshold.

Reject

In the context of statistical hypothesis testing, to conclude that the evidence is sufficiently strong to discard the null hypothesis.

Binge Drinking

The consumption of an excessive amount of alcohol in a short period of time, typically defined as five or more drinks for men and four or more drinks for women in about two hours.