SOLUTION: Sherry Weinstein, a buyer, has decided that she will spend an extra $7 per shirt for the next 10,000 T-shirts she buys for her chain of stores only if the vendor of the more expens

Question 138547: Sherry Weinstein, a buyer, has decided that she will spend an extra $7 per shirt for the next 10,000 T-shirts she buys for her chain of stores only if the vendor of the more expensive shirt can show conclusive evidence that its shirt can withstand at least 20 more times in the wash without fading. The vendor elected to set 1 as the mean number of washes without fading for the more expensive shirt. An appropriate null hypothesis for the vendor to test is:
a. H0: u1 � u2<= 20.
b. H0: u1 � u2 < 20.
c. H0: u1 � u2 > 20.
d. H0: u1 � u2<= 0.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Your posting was somewhat garbled.
If u1 is the minimum number of extra washings the lady requires then
Ho: u1-u2 >= 20
Ha: u1-u2 < 20
======================
Cheers,
Stan H.
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