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A community survey sampled 1923 people in Colorado and asked them how long it took them...

A community survey sampled 1923 people in Colorado and asked them how long it took them to commute to work each day. The sample mean one-way commute time was 25.1 minutes with a standard deviation of 13 minutes. A transportation engineer claims that the mean commute time is greater than 25 minutes. Do the data provide convincing evidence that the engineer's claim is true? Use the a = 0.10 level of significance and the critical value method with the critical values for the student distribution table.

A) Compute the value of the test statistic. Round answer to at least 3 decimal places.

t=

B) Critical value

C) State a conclusion

math   Statistics-And-Probability   
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