On sale, the price of a shirt was $16. Originally, it was $20. Find the percent of decrease.
Equals 20 I think
Answer:
a)
And rounded up we have that n=543
b)
And rounded up we have that n=1509
c)
And rounded up we have that n=13573
Step-by-step explanation:
For this case since we don't have previous info we can assume that the best estimator for the true proportion is
The margin of error for the proportion interval is given by this formula:
(a)
Part a
The significance level is The critical value would be for this case:
And on this case we have that and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=543
Part b
And rounded up we have that n=1509
Part c
And rounded up we have that n=13573
The answer would be A!!! Hope it helped
Answer:
The answer is FPQRS
Step-by-step explanation:
I got It right on I-Ready