1. Mr. Rogers want to buy candies for some of the students who are attending
the trip to the zoo.
• There are 7 classes, and each class has 28 students.
• There will be 12 adults going with the students.
• Mr. Rogers knows he can get a good price by buying tickets in packs
of 20.
How many packs of tickets should Mr. Rogers buy?
(A) 100 packs
(C) 200 packs
(B) 10 packs
(D) 20 packs

People end up tossing 12% of what they buy at the grocery store. assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a. calculate the mean and the standard error for the sample proportion p. b. describe the sampling distribution of p in part a. draw a graph of this probability distribution with its mean and standard deviation. what is the probability that your survey will provide a sample proportion more than 15%? c. d. population proportion? what is the probability that your survey will provide a sample proportion within + 0.03 of the