A paint manufacturer wanted to compare the drying times of two different types of paint. Independent simple random samples of 11 cans of type A and 9 cans of type B were selected and applied to similar surfaces. The drying times, in hours, were recorded. The summary statistics are as follows. Type A Type B x1 = 71.5 hr x2 = 68.5 hr s1 = 3.4 hr s2 = 3.6 hr n1 = 11 n2 = 9 a). Construct a 99% confidence interval for µ1 - µ2 , the difference between the mean drying time for paint type A and the mean drying time for paint type B b). Run a hypt. test to determine the results *Alt is not equal *Make sure to select pooled C) Compare parts A and B.
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from
1) A paint manufacturer wanted to compare the drying times of two different types of paint.
Independent simple random samples of 11 cans of type A and 9 cans of type B were selected and
applied to similar surfaces. The drying times, in hours, were recorded. The summary statistics are
as follows.
Type A Type B
x1 = 71.5 hr x2
= 68.5 hr
s1 = 3.4 hr s2 = 3.6 hr
n1 = 11 n2 = 9
a). Construct a 99% confidence interval for µ1
- µ2
, the difference between the mean drying time
for paint type A and the mean drying time for paint type B
b). Run a hypt. test to determine the results
*Alt is not equal
*Make sure to select pooled
C) Compare parts A and B.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 4 images
