10
QuizMultiple Choice
Calculating Probabilities for Sampling Distribution
Question 10 • NC-Math 4
A ceiling fan manufacturer claims that 89% of homes in the South have ceiling fans. A random sample of 100 Southern homes was surveyed, and 85 had ceiling fans. Let = the proportion of the sample homes that have ceiling fans.The probability that 85% or fewer homes in the South have ceiling fans is 0.098. Does this result provide convincing evidence against the manufacturer’s claim?
Answer
A
Yes, it is expected that at least 85 homes have ceiling fans.B
Yes, the probability of seeing the sample result is so far from what is expected that the probability of it occurring by chance alone is very unlikely.C
No, the difference between the sample result and what is expected is not extreme enough.D
No, there is a very small chance of seeing the sample result. It is unlikely to occur by chance alone.