Answer:
68257
Step-by-step explanation:
Answer:
The corrrect answer is -16 and +3
Answer: a. $128.125
Step-by-step explanation:
The standard error of the mean is given by :
, where
= population standard deviation , n= sample size.
Given: 
n= 256
Then, the standard error of the mean:-

Hence, option a. is correct.
The answer would be 4 x 4 = 16+14= 30