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A survey of 30 people was conducted to compare their self-reported height to their actual height....

A survey of 30 people was conducted to compare their self-reported height to their actual height. The difference between reported height and actual height was calculated.

You're testing the claim that the mean difference is greater than 0.

From the sample, the mean difference was 0.3, with a standard deviation of 0.56.

Calculate the test statistic,

rounded to two decimal places

Math   Statistics-And-Probability   
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Answer #1

The null and alternative hypothesis for this test is :

; i.e., the true mean of the difference of self-reported height and actual height is zero.

; i,e, the true mean of the difference of self-reported height and actual height is greater than zero.

Test-statistic:        ,    with degrees of freedom, df=n-1

Given:   

The test-statistic is calculated as t=2.93

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