Need help with Statistics assignment

Statistics
Tutor: None Selected Time limit: 1 Day

For a certain urban area, in a random sample of 5 months, an average of 28 mail carriers were bitten by dogs each month. The standard deviation of the sample was 3. Find the 90% confidence interval of the true mean number of mail carriers who are bitten by dogs each month. Assume the variable is nor distributed.

Oct 29th, 2015

Thank you for the opportunity to help you with your question!

At  90  percent  level  of  confidence  from  the  tables  we  get   2.132

Then  we  calculate  the  true  mean

28+or- 2.132(3/square root5)

this  gives  us  25.15<u<30.85  as  our  true  mean

Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 29th, 2015

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Oct 29th, 2015
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Oct 29th, 2015
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