Answer:
x/4+3
Step-by-step explanation:
Answer:
6750
Step-by-step explanation:
Given the sample mean is
and population standard deviation is
.
Now the standard deviation of the sample mean is 
The
confidence interval for population mean is
.
Here 
The 90% CI for population mean is

Answer:
x is 20
Step-by-step explanation:
3x-14=46
3x=60
x=20