Answer:
The 96% confidence interval for the population proportion of customers satisfied with their new computer is (0.77, 0.83).
Step-by-step explanation:
We have to calculate a 96% confidence interval for the proportion.
We consider the sample size to be the customers that responded the survey (n=800), as we can not assume the answer for the ones that did not answer.
The sample proportion is p=0.8.

The standard error of the proportion is:

The critical z-value for a 96% confidence interval is z=2.054.
The margin of error (MOE) can be calculated as:

Then, the lower and upper bounds of the confidence interval are:

The 96% confidence interval for the population proportion is (0.77, 0.83).
Answer:
the solution 
Step-by-step explanation:
<u>Step 1:-</u>
Given problem 
here l.cm is x

cross multiplication we get ,

<u>Step 2</u>:-
subtracting x y on both sides , we get

taking common 'x' we get,

<u>Final answer</u>:-

Answer:
-55
Step-by-step explanation:
It would be -55 because the exponent is 4. So, that would leave -55 to be the right answer.
Answer:
Number of friends in the group = 9
Step-by-step explanation:
Number of cards in the package = 108
Number of cards each friend gets = 12
How many friends were in the group?
Number of friends in the group = Number of cards in the package / Number of cards each friend gets
= 108 / 12
= 9
Number of friends in the group = 9