Testing a Claim about a Difference between Proportions — Unit test
Question 9 • AQR_A_IC
A 95% confidence interval for the true proportion of math students who prefer to use a handheld calculator versus computer software for computations is (0.751, 0.863). Is it reasonable to believe more than 75% of math students prefer to use a handheld calculator versus computer software for computations?
Answer
A
Yes, because the entire interval is greater than 0.75.
B
Yes, because the center of the interval is 0.807, which is greater than 0.75.
C
No, because a different sample might give different results.
D
No, because 0.751 is barely greater than 0.75, which is not statistically significant.