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Please show steps in the calculation. Please make sure you include checking conditions for using the...

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Statistics

Please show steps in the calculation. Please make sure youinclude checking conditions for using the CLT.

The Human Resources (HR) Department of a certain college hasasked all employees who were employed in 2018 to fill out a surveyin December 2018. Three items on the survey were: “Your dentalexpense in 2018”, “Are you in a family with at least three otherfamily members?”, and “Your medical expenses in 2018”. The managerof HR has randomly selected a sample of 169 surveys. Found that thesample average dental expense is $1600 per person with the samplestandard deviation is $500. 70 of them are in a family of at leastthree other members. Also, the sample average medical expense is$2,450 per person and the sample standard deviation is $700.

  1. The statistical inference will be made in parts (b), (c) and(d). Please clearly state the three parameters ofinterest.
  2. Provide a 99% interval estimate of the average dental expensesper employee who was employed in the year 2018. pleaseinterpret your answer.

Answer & Explanation Solved by verified expert
3.6 Ratings (562 Votes)
Here n 169Sample average 1600Sample standard deviation s 500Here population standard deviation is not given so we will usehere t    See Answer
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