A researcher claims that the standard deviation of weights of adult male runners is less than 1515 pounds. In the general population, the standard deviation is known to be 1515 pounds. The weights (in pounds) of 1818 randomly selected runners are recorded. At the α=0.01\alpha=0.01 significance level, test the claim that the standard deviation is less than 1515 pounds.

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1. Intro to Stats and Collecting Data(0)

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Visualizing Qualitative vs. Quantitative Data
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3. Describing Data Numerically(0)

Mean
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Interpreting Standard Deviation
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Introduction to Confidence Intervals
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Confidence Intervals for Population Mean
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Determining the Minimum Sample Size Required
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Sampling Distribution of Sample Proportion
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Chi Square Distribution
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Performing Hypothesis Tests: Variance
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Two Means - Unknown, Unequal Variance
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9. Hypothesis Testing for One Sample

Performing Hypothesis Tests: Variance

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Problem 12Multiple Choice

A researcher claims that the standard deviation of weights of adult male runners is less than $15$ pounds. In the general population, the standard deviation is known to be $15$ pounds. The weights (in pounds) of $18$ randomly selected runners are recorded. At the $alpha equals 0.01$ significance level, test the claim that the standard deviation is less than $15$ pounds.

Reject the null hypothesis; there is evidence that the standard deviation is less than $15$ pounds.

Fail to reject the null hypothesis; there is insufficient evidence to support the claim.

Fail to reject the null hypothesis; there is evidence that the standard deviation is less than $15$ pounds.

Reject the null hypothesis; there is insufficient evidence to support the claim.

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