Question

Question.1: : In a faculty of dentistry, the average durabilitiy of dental fillings made using a particular medication by the assistant as a dissertation. The ?=?? dental fillings made using the medication are selected randomly and the sample mean and the sample stanadart deviation are calculated as; ?̅ =* year, S= * year. For the population mean μ, obtain the two sided confidence interval.
Note:
Take the sample mean value from the interval [5,10]
( no digit)
Take the standard deviation value from the interval [1,4] with two digit after the point.
Take the (?−?) value from the 0.90, 0.95, 0.99 most used values. Explain which case you use.

Question.2: ( for question 1)
The assistant claim that, the average durability of the dental fillings is different from the ?0 year. ( ???? ?ℎ? ?0 ????? ????????) To test the hypothesis.
a.Write the ?? ve ?? hypothesis
b.Obtain the calculated value.
c.Show the critical region.
d.What is your conclusion.

Answer 1