A sample of 64 was taken from a population, with the mean of the sample being 43 and the standard deviation of the sample being

Question

4 years ago

13

6. What is the 95% confidence interval for the mean of the population?
A. (42.25, 43.75)
B. (37.3, 48.7)
C. (41.5, 44.5)
D. (37, 49)

1 answer:

zzz [600] · Answer 1 · 2021-11-24T05:54:54+03:00

zzz [600]4 years ago

5 0

Answer:

C. (41.5, 44.5)

Step-by-step explanation:

Point estimate of population variance:

64(6²)/63

256/7

xbar +/- [z × sqrt(var/n)]

43 +/- [1.96 × sqrt(256/7 ÷ 64l]

43 +/- 1.481620735

[41.51837927 , 44.48162073]