Ten professional golfers are asked to hit each of two brands of golf ball with their drivers. The golfers do not know which brand they are hitting, and the order in which they hit the balls is determined by flipping a coin. The distances of their drives are listed in the table.
Golfer | Brand 1 | Brand 2 |
---|---|---|
1 | 265 | 268 |
2 | 281 | 283 |
3 | 260 | 257 |
4 | 274 | 277 |
5 | 269 | 270 |
6 | 288 | 291 |
7 | 271 | 275 |
8 | 270 | 274 |
9 | 267 | 269 |
10 | 284 | 288 |
To test for a difference in the mean length of the two brands, we would use the
Select one:
a. one-sample t test.
b. matched pairs t test.
c. two-sample t test.
Solution:
We are given that: Ten professional golfers are asked to hit each of two brands of golf ball with their drivers. The distances of their drives are measured.
We have to determine which test should be used to test for a difference in the mean length of the two brands.
Here we are measuring the distances of drives by golfers by using two different Brands of golf ball, thus subject ( golfer) in the study of two brands of golf ball is same.
That is we are taking or considering pairs of observations made on two golf ball by same subject ( golfer) Thus this is paired sample.
Thus we use Matched Pairs t test.
Thus correct option is: b. Matched Pairs t test.
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