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A survey of 22 people about commuting times finds that the average time to work/school is...

A survey of 22 people about commuting times finds that the average time to work/school is 26.5 minutes with a standard deviation of 12.5 minutes.


a) What is the SE for this data ?


b) What is the 95% t -value?


c) Write out the confidence interval.


d) Does this data support the guess that the population average time is 32 mintues?
Math   Statistics-And-Probability   
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