Name ______Date ______
Math 7AC
Statistics Review Sheet
1. Which type of data display would be best for showing the results of a survey on students' favorite school subject?
A. bar graphB. line graphC.box plotD. histogram
2. A survey found that 3 out of 7 people in a communityjog on a regular basis. If there are 3,150 people in the community, what is a reasonable prediction for the number of people who would jog regularly?
A. 1,050B. 1,350C. 1,575D. 1,800
3. A survey showed that 90% of students wouldselect roller coasters as their favorite ride at an amusement park. Out of 5,000 students, predict how many would select roller coasters as their favorite ride?
A. 4,500B. 500C 450D. 50
4. The double line plot shows the number of students who attended thehome games of the baseball team for two recent seasons.
Which of the following statements is not true?
A. The attendance for 2009 was more varied.
B. The attendance for 2010 was more consistent.
C. The attendance for 2009 peaked at 23 students.
D. The attendance for 2010 ranged from 20 to 27.
5. Which of the following is an appropriate display to show the pricesof gasoline over the past 8 months?
A. line graphB. bar graphC. circle graphD. histogram
6. Tommy surveyed 50 random people about what their favorite movie type was and his results are listed below. If he was to survey 500 people, how many people would you predict would name comedy?
7. Which measure of center best represents the following data set? Explain.
Prices of sneakers: $45, $52, $36, $49, $93, $58
8. To determine what parkvisitors like, every tenth visitor is surveyed at the park entrance. Out of180 visitors, 22% said they would like to have more walking paths. Thepark manager concludes that about one-fifth of all parkvisitors would like to have more walking paths. Is this conclusion valid? Justify your answer.
For Exercises 9 and 10, use the box plot that showsstudents test scores for two classrooms.
9. Which class had agreater range of scores?
10. Write an inference you can make about the populations.
11. Use the following set of data: 12, 22, 10, 15, 25, 19, 29, 8, 6, 30, 18, 15, and 20.
a) What are the median, first and third quartiles of the data?
b) What is the interquartile range of the data?
c) Draw a box plot for the data above:
12. The table shows theamount of rainfall in an areafor six months. What is the mean absolute deviation of the data and describe what this means.