Answer:
=
Step-by-step explanation:
14.86 is the answer to this question
Answer:
x = -2 & y = 6
Step-by-step explanation:















Hope this helps.
Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation : 
The formula to find the standard error of the mean is given by :-

i.e. 
Hence, the standard error of the mean =0.5
Answer:
x = 30
Step-by-step explanation:
