Patrons in the children's section of a local branch library were randomly selected and asked their ages. The librarian wants to
use the data to infer the ages of all patrons of the children's section so he can select age-appropriate activities. The ages of the children in the random sample are shown below. 6, 4, 3, 10, 5, 4, 7, 11, 5, 7 Make a dot plot of the sample population data.
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
Let X be the length of pregnancy.
X is N(268, 15)
a) Prob of pregnancy lasting 307 days or longer
= P(X>307) =
=0.5-0.4953
=0.0047
b) Lowest 2% is 2nd percentile
Z=-2.55
X score = 268-2.55(15)
= 229.75 days
If length of days >230 days then it is not premature.