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# A paint manufacturer which is to compare the drying times of two types of paint. Independent...

A paint manufacturer which is to compare the drying times of two types of paint. Independent samples random samples of 11 cans of Type A and nine cans of Type B selected and applied similar services. The drying times, and hours, recorded. The summary statistics are as follows:

Type A. Type B

x1=77.5 hours. x2=63.6 hours

s1=4.5 hours. s2=5.1 hours

n1=11. n2=9.

Construct a 98% confidence interval the difference in mean drying times for type a and type B

a.) 8.42hrs < μ1-μ2 < 19.38hrs

b.) 8.28 < μ1-μ2 < 19.52

c.) 8.35 < μ1-μ2 < 19.45

d.) 8.58 < μ1-μ2 < 19.22

Answer #1

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