Answer: a) 27.5, b) 5.33.
Step-by-step explanation:
Since we have given that

and n = 180
We need to calculate the sample mean and sample standard deviation.
So, the mean of the distribution of sample means is

The standard deviation of the distribution of sample means is

Hence, a) 27.5, b) 5.33.
Answer:
A
Step-by-step explanation
Well the boys can be chosen again all in a row but the girls cdan't therfore the answer is A
Hope This Was Helpful!
When you distribute you should get

Simplify to get

Answer 2 is correct
Answer:
15
Step-by-step explanation: