A grocery store chain has been tracking data on the number of shoppers that use coupons. The data shows that 71% of all shoppers

Question

nadezda [96]

3 years ago

14

A grocery store chain has been tracking data on the number of shoppers that use coupons. The data shows that 71% of all shoppers

use coupons. 18 times out of 20 these results were considered accurate to within 2.5%

Mathematics

2 answers:

sesenic [268] · Answer 1 · 2022-04-17T10:26:21+03:00

<span>The computation for the confidence level = (18/20) x 100% = 90 %, the E or the margin error = 0.023 and the p = to 0.71. Confidence interval can be achieved by using the formula (p-E, p+E) = (0.71-0.025, 0.71+0.025). Therefore, the confidence interval is (0.685,0.735).</span>

Y_Kistochka [10] · Answer 2 · 2022-04-17T12:10:18+03:00

Y_Kistochka [10]3 years ago

3 0

Answer:

90%

Step-by-step explanation:

18/20 = .9

.9*100= 90%