Consider an infinite population with a mean of 160 and a standard ...

[MirandaLo]

Consider an infinite population with a mean of 160 and a standard deviation of 25 . A random sample of size 64 is taken from this population. The standard deviation of the sample mean equals:
 a. 25 c. 25/64
  b. 25/64 d. None of these choices.

Question 2

The probability distribution of the error variable is normal, with mean E() = 0, and standard deviation  =1.
  Indicate whether the statement is true or false

[xiaomengxian]

Answer to Question 1

C

Answer to Question 2

F

[MirandaLo]

Thank you

[xiaomengxian]

Happy to help you