There are 25 questions on your math test. You have completed 5 questions so far. What fraction of the total questions do you sti
2 answers:
Answer:
Step-by-step explanation:
If you have completed questions, you still have
more questions to answer. We need to find what fraction
is of
, if that makes sense. A fraction is simply a part over a whole. In this case, the part is
and the whole is
. Therefore, the fraction we are looking for is
, which simplifies to
. Hope this helps!
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Answer:
The 95% confidence interval for the fraction of all shoppers during the year whose visit was because of a coupon they'd received in the mail is (0.2016, 0.2694).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of .
A store randomly samples 603 shoppers over the course of a year and finds that 142 of them made their visit because of a coupon they'd received in the mail.
This means that
95% confidence level
So , z is the value of Z that has a p-value of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the fraction of all shoppers during the year whose visit was because of a coupon they'd received in the mail is (0.2016, 0.2694).
I HOPE IT WILL HELP YOU. I DID HOW I KNOW .
