A Random Variable X Is Best Described by a Continuous

question 89

Multiple Choice

A random variable X is best described by a continuous uniform distribution from 20 to 45 inclusive.What is P(30 ≤ X ≤ 40) ?

• A)0.20
• B)0.40
• C)0.60
• D)0.80

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Definitions:

Sum of Differences

The total sum calculated by subtracting each value in a dataset from a specific value (often the mean), used in various statistical computations.

Null Hypothesis

A hypothesis in statistics that proposes no significant difference or effect, serving as the default or starting assumption in hypothesis testing.

Dependent Samples

Pairs of samples where the members are matched or related, often used in experiments to compare two conditions or treatments.

Pretest and Posttest

Assessments administered before and after an intervention or experiment to measure the impact of the intervention.