What is it? Is there a picture
Answer:
Step-by-step explanation:
Good Morning If you can be more specific i can help you with this question but there is no table text me back if oyu still need help! ;)
Answer:
8
x
−
3
Hope this helps, if it does please give brainliest
The answer is 2 because the d/f is -5 so the term is bigger than 7
Answer:
The 98% confidence interval for the mean purchases of all customers is ($37.40, $61.74).
Step-by-step explanation:
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 mean subtracted by M. So it is 49.57 - 12.17 = $37.40.
The upper end of the interval is the mean added to M. So it is 49.57 + 12.17 = $61.74.
The 98% confidence interval for the mean purchases of all customers is ($37.40, $61.74).