Ap Statistics Unit 5 Progress Check: Mcq Part B Study Guide Questions And Correct Answers

A survey of 100 randomly selected dentists in the state of Ohio results in 78% who would recommend the use of a certain toothpaste. The population proportion is known to be p=0.72. For samples of size 100, which of the following best interprets the mean of the sampling distribution of sample proportion of dentists in the state of Ohio who would recommend the use of a certain toothpaste? {Ans: The mean of all sample proportions from all random samples of 100 dentists in the state of Ohio is equal to 0.72.}At a national convention attended by many educators, about 30 percent of the attendees are from the northeast. Of all the attendees of the national convention, 25 will be selected at random to receive a free book. What are the mean and standard deviation of the sampling distribution of the proportion of attendees from the northeast for samples of size 25 ? {Ans: C The mean is 0.3 and the standard deviation is √0.3(0.7)/25.}In one city, 75 percent of residents report that they regularly recycle. In a second city, 90 percent of residents report that they regularly recycle. Simple random samples of 75 residents are selected from each