Q2. A laundry for car wash found that the averago, for small size car, cleaning time is 5 mins in the morning and 6.5 mins at evening time when a sample of size 30 is taken at the two time periods. From the previous record, the laundry manager knew that car o = 2 mins for the morning shift and oz = 2.5 mins for morning and evening repectively. Find the interval estimate for u - Ha with 90% confidence level.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Q2. A laundry for car wash found that the average, for small size car, cleaning time is 5
mins in the morning and 6.5 mins at evening time when a sample of size 30 is taken at the two
time periods. From the previous record, the laundry manager knew that car oj = 2 mins for the
morning shift and oz = 2.5 mins for morning and evening repectively. Find the interval estimate
for 4 - 42 with 90% confidence level.
Transcribed Image Text:Q2. A laundry for car wash found that the average, for small size car, cleaning time is 5 mins in the morning and 6.5 mins at evening time when a sample of size 30 is taken at the two time periods. From the previous record, the laundry manager knew that car oj = 2 mins for the morning shift and oz = 2.5 mins for morning and evening repectively. Find the interval estimate for 4 - 42 with 90% confidence level.
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