A student wanted to quickly construct a 99% conﬁdence interval for the average age of students in
Her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a
Standard deviation of 1.5 years. What is the 99% conﬁdence interval for the population mean?
A) [17.42, 20.78]
B) [17.48, 20.72]
C) [14.23, 23.98]
D) [0.44, 3.80]
E) [17.95, 20.25]

Question

Quizplus · Accepted Answer

[17.42, 20.78]

A Student Wanted to Quickly Construct a 99% Conﬁdence Interval