In: Statistics and Probability
A random sample is drawn from a population with mean μ = 70 and standard deviation σ = 5.8. [You may find it useful to reference the z table.]
a. Is the sampling distribution of the sample mean with n = 17 and n = 43 normally distributed?
Yes, both the sample means will have a normal distribution.
No, both the sample means will not have a normal distribution.
No, only the sample mean with n = 17 will have a normal distribution.
No, only the sample mean with n = 43 will have a normal distribution
Solution :
Given that,
mean = = 70
standard deviation = = 5.8
a) n = 17
= = 70
= / n = 5.8 / 17 = 1.41
n = 43
= = 70
= / n = 5.8 / 43 = 0.88
Yes, both the sample means will have a normal distribution.