Answer:
The average number of hours of sleep for working college students is between 6.85 and 6.15 hours
Explanation:
We are given,
Average = M = 6.5
Standard Deviation = S = 2.14
t = 1.660
sample size = n = 101
So,
(t)(S)/(√n) = (1.660)(2.14)/√(101)
= 0.3535
Now,
The confidence interval is,
CI = M ± (t)(S)/(√n)
CI = 6.5 ± 0.3535
Upper limit = 6.5 + 0.3535
Upper limit = 6.85 hours
Lower limit = 6.5 - 0.3535
Lower limit = 6.15 hours
Hence,
the average number of hours of sleep for working college students is between 6.85 and 6.15 hours