Here Are Some Summary Statistics for All of the Runners $\text { time } = 129$

question 32

Multiple Choice

Here are some summary statistics for all of the runners in a local 12 kilometre race: slowest $\text { time } = 129$ minutes, $\text { mean } = 79$ minutes, $\text { median } = 79$ minutes, $\text { range } = 99$ minutes, $\mathrm { IQR } = 64 \text {, }$ $\mathrm { Q } 1 = 32$ standard $$\text { deviation } = 11$$ minutes.Suppose last year's race results were better by 8%.Find last year's mean and standard deviation.Express your answer in exact decimals.

• A)Mean: 6.32 minutes,SD: 0.88 minutes
• B)Mean: 85.32 minutes,SD: 11 minutes
• C)Mean: 85.32 minutes,SD: 11.88 minutes
• D)Mean: 72.68 minutes,SD: 10.12 minutes
• E)Mean: 72.68 minutes,SD: 11 minutes

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Definitions:

Assembly Process

The method or series of actions taken to assemble components into a finished product.

Hypothesis Test

A technique in statistical analysis that leverages sample data for examining a hypothesis related to a population attribute.

Significance Level

The significance level is the threshold below which a p-value indicates that the null hypothesis can be rejected, commonly set at 0.05 or 5%.

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