I don’t know sorry bro sorry
Answer:
3
Step-by-step explanation:
Answer:
x=3
Step-by-step explanation:I hop that this helps
Answer:
The 95% confidence interval for the population mean is between $20.51 and $24.21.
Step-by-step explanation:
The first step to find this question is find the sample mean

Confidence interval
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
So it is z with a pvalue of
, so 
Now, find M as such

In which
is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 22.36 - 1.85 = $20.51
The upper end of the interval is the sample mean added to M. So it is 22.36 + 1.85 = $24.21
The 95% confidence interval for the population mean is between $20.51 and $24.21.
That would be 22.4 if you divide it