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.
5 | 19 | 10 | 24 | 29 |
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.)
(_____ ,_____ )
We have for given data,
Sample mean =17.4
Sample standard deviation =9.8641
Sample size =5
Level of significance=0.05
Degree of freedom =4
t critical value is (by using t table)=
2.776
Confidence interval formula is
=(5.15,29.65)
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