For Normal Distribution, What Percentage of the Data Will Fall

question 15

Multiple Choice

For normal distribution, what percentage of the data will fall in the interval of one standard deviation above and below the mean?

• A)50%
• B)65%
• C)68%
• D)95%

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Definitions:

Type I Error

Incorrectly refuting a correct null hypothesis, also labeled as a "false positive."

Null Hypothesis

A hypothesis stating there is no significant difference or effect, used as a starting point for statistical testing.

Significance Level

A threshold for determining whether an observed effect is statistically significant, often set at 0.05.

Alternative Hypothesis

A hypothesis that contradicts the null hypothesis, proposing a new effect or relationship.