Under the Normal Curve,approximately What Percentage of Scores Falls Between

question 11

Multiple Choice

Under the normal curve,approximately what percentage of scores falls between -1 and -2 standard deviations below the mean?

• A)14%
• B)34%
• C)68%
• D)95%

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Definitions:

P-Value

The probability of obtaining test results at least as extreme as the results actually observed, assuming that the null hypothesis is true.

Significance Level

The threshold against which the p-value is judged to determine statistical significance, often denoted by alpha (α) and commonly set at 0.05 or 5%.

Significance Level

A threshold or probability used in statistical hypothesis testing to determine whether to reject the null hypothesis, often denoted by alpha with a common value of 0.05.

Z-statistic

A statistic that measures the distance in standard deviations of a sample mean from the population mean under the null hypothesis.