Using the dotplot and the proportion of winners in the store owner’s sample, is there convincing evidence that the manufacturer’s claim is wrong?
Answer
A
No, because a proportion of 0 point 4 or more occurred 25 out of 100 times, the sample proportion of winners is not statistically significant and there is not convincing evidence that the manufacturer’s claim is false.
B
Yes, because a proportion of 0 point 4 or less occurred 75 out of 100 times, the sample proportion of winners is statistically significant and there is convincing evidence that the manufacturer’s claim is false.
C
No, because a proportion of 0 point 4 or less occurred 75 out of 100 times, the sample proportion of winners is not statistically significant and there is not convincing evidence that the manufacturer’s claim is false.
D
Yes, because a proportion of 0 point 4 or more occurred 25 out of 100 times, the sample proportion of winners is statistically significant and there is convincing evidence that the manufacturer’s claim is false.