Question

Five students visiting the student health center for a free dental examination during National Dental Hygiene Month were asked how many months had passed since their last visit to a dentist.

Their responses were as follows. 6 18 12 21 28

Assuming that these five students can be considered a random sample of all students participating in the free checkup program, construct a 95% confidence interval for the mean number of months elapsed since the last visit to a dentist for the population of students participating in the program. (Give the answer to two decimal places.) ( Incorrect: Your answer is incorrect. , Incorrect: Your answer is incorrect. ) You may need to use the appropriate table in Appendix A to answer this question.

Answer 1

95% confidence interval for the mean number of months elapsed since the last visit to a dentist for the population of students participating in the program is computed as follows:

Where,

Therefore,

C. I. = ( 6.5392 , 27.4608 )

C. I. = ( 6.54 , 27.46 )