Assignment- 1.Collecting Data

If six out of 15 customers order a chicken sandwich, how many chicken sandwiches should a restaurant predict they will need to serve 270 people? 90 270 108 120 READ NEXT SECTION

108

Fifty students were randomly selected to take part in a survey about their favorite school lunch. Each student was allowed to only pick one item. The results are shown below. Food Item PreferredNumber of Studentspizza27cheeseburger14salad bar9 Based on the information above, if the school served 500 lunches, how many pizzas can they expect to serve? 90 140 27 270

270

A cola company wants to test their cola against their biggest competitor's cola. They decide to randomly sample 150 people. The results from their survey show that 98 people out of 150 people prefer their cola to their competitor's. What is the best prediction of the number of people who will prefer their cola if 1,200 people are asked? 1,078 686 980 784

784

A group of students wants to determine the favorite snack food at their school. They know they should use a sample because the student population at their high school is 5,000. What is the best way for them to get a random sample of 100 students? Ask all the students in the cafeteria during one of the four lunch periods. Ask the first 100 students that get off the bus in the morning. Ask every 20 th student until they reach 100 students. Ask the teachers at the school their opinions.

Ask every 20 th student until they reach 100 students.

Miguel surveyed all the members of the junior high choir about their favorite class. The results from his survey are: Favorite ClassNumber of Studentschoir19math7history5English9science4 Miguel concluded, from his results, that the favorite class among the entire student body would also be choir. Which is the best explanation of why his conclusion might not be true? The choir only meets one day a week. The survey should have been conducted each day for a week. His sample group does not represent the entire student body. The survey should have been conducted with the eighth-graders only.

His sample group does not represent the entire student body.

A biased systematicunbiased sample is a sample that isn't representative of the entire population.

biased

A teacher polled only the 8th grade students in English classrooms on what their favorite color is. She found that the favorite color of the school is blue. What kind of sample is this? random sample biased sample systematic sample self-selected sample

biased sample

stratified sample self-selected sample biased sample systematic sample

systematic sample