Apaint manufacturer wished to compare the drying times of two different types of paint. Indeperdent simple random samples of 31 cars of type A arid 39 cans of type l were selected and applied to similar surfaces. The drying times, in hours, were recorded Check requirement then construct and interpret a 98% confdence interval for ul 2, the difference between the mean drying time for palnt of type A and the mean drying time for paint of type The summary statistics are as follow Type A Type B nl 41 In2 39 sample mean 75.7 hes $1-45hrs sample mean64 hours 62-51

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A paint marufacturer wished to compare the drying times of two different types of paint. Indeperident simple random samples of 31 cans of type A and 39 cans of type B were
selected and applied to similar surfaces. The drying times, in hours, were recorded. Check requirement then construct and interpret a 98% conhdence interval for al - 2, the
difference between the mean drying time for paint of type A and the mean drying time for paint of type R The summary statistics are as folow
Type B
2 - 39
Type A
Int 41
sample mean-75.7 hs
sample mean-643 hours
s1-45 hrs
62 51
Transcribed Image Text:A paint marufacturer wished to compare the drying times of two different types of paint. Indeperident simple random samples of 31 cans of type A and 39 cans of type B were selected and applied to similar surfaces. The drying times, in hours, were recorded. Check requirement then construct and interpret a 98% conhdence interval for al - 2, the difference between the mean drying time for paint of type A and the mean drying time for paint of type R The summary statistics are as folow Type B 2 - 39 Type A Int 41 sample mean-75.7 hs sample mean-643 hours s1-45 hrs 62 51
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