Question

a study reports the mean time to distraction for teenage boys is less than 5 minutes....

a study reports the mean time to distraction for teenage boys is less than 5 minutes. Based on a random sample of 100 teenage boys, the MEAN time to distraction is 4.8 minutes with a standard deviation of 1.8 minutes. At the 10% LOS, does the sample support the study?

Math   Statistics-And-Probability   
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Answer #1

Given : Sample size=n=100

Sample mean=

Sample standard deviation=s=1.8

Significance level=

Hypothesiized value=

1) Hypothesis : Vs  

2) The test statistic is ,

3) The critical value is ,

The Excel function is , =TINV(2*0.1,99)

4) Decision : The value of the test statistic does not lies in the rejection region.

Therefore , Do not reject the null hypothesis .

Conclusion : Hence , There is not sufficient evidence to support the study reports that the mean time to distraction for teenage boys is less than 5 minutes.

i.e. the sample data does not support to this study.

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