00:01
A store wants to try using a coupon strategy.
00:03
They consider their coupons successful if more than 10 % of the customers who receive coupons actually use them.
00:09
So to test this strategy, they mail 100 coupons out to 100 of the customers to see if more than 10 % would use them.
00:16
So we're supposed to use this 100 customer test to see if the strategy would be successful.
00:23
So part a is to develop a hypothesis to test whether the coupon strategy is successful.
00:28
So it would be successful.
00:30
So this is the alternative hypothesis, if more than 10 % use the coupons.
00:40
And unsuccessful, that's the null hypothesis, if 10 % or less use the coupons.
00:52
Now in part b, there is a file that accompanies the textbook, which has the data for this 100 coupon test.
01:01
So from the file, we're supposed to develop a point estimate.
01:04
So the best point estimate is the number of people in the file who actually use the coupon divided by the total number.
01:11
So there were our 100 people that this was tried with.
01:16
And the number that said yes is 13.
01:22
So from this, our sample proportion is 0 .13...