Name:_____________________________ Honors 7th Grade Math Block :_______ Unit 9 Practice TestDIRECTIONS: Please show all work; I reserve the right to give no credit for correct solutions with no supporting work. Please have work on a separate sheet paper organized and numbered. Good luck!! Indicator 29The table shows the number of birds observed at a feeder each week.

1. Make a scatter plot of the data.

2. Draw a line of best fit.

3. Write an equation of the line of best fit.

4. Estimate how many birds will be at the feeder on week 7.

For numbers 5 – 7, tell whether the data show a positive, a negative, or no relationship.

5.Class size 7.

6.Television ratings

For numbers 8 - 10, you randomly survey students in a cafeteria about their plans for a football game and a school dance. The results of the survey are shown in the two-way table.

8. How many of the students in the survey are attending the dance but not the football game?

9. How many students were surveyed?

10. What percentage of the students in the survey are not attending either event?

Indicator 30

In Exercises 11–13, use the histogram that shows the number of seashells collected by children at a beach party.

11. How many children were at the party?

12. Which interval contains the fewest amount of data values?

13. Which interval contains the greatest amount of data values?

Week 1 2 3 4 5 6

Viewers (millions) 5.1 5.0 4.5 4.2 3.9 4.0

Week 1 2 3 4 5 6

Birds 46 40 39 35 30 27

Indicator 29

1. On graph

2. On graph

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Indicator 30

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Class 1 2 3 4 5

Students 30 22 31 10 20

In Exercises 14–15, use the circle graph that shows the types of shoes in a store. The store has 720 pairs of shoes.

14. Find the number of pairs of athletic shoes.

15. What percent of the shoes are sandals?

Indicator 31

For questions 16 – 20, use the above box-and-whisker plots.

16. On which test did the class have a higher average overall?

17. What was the upper extreme on Test 1?

18. What was the median for Test 2?

19. What percent of the students for Test 1 scored between 6 and 16?

20. What percent of the students for Test 2 scored 9 or higher?

Indicator 32

21. Identify the population.

42 workers at the manufacturing plant

All of the workers at the manufacturing plant

22. Which sample is better for making a prediction? Explain.

Predict the number of customers who enjoy shopping at this store

Sample A: A random sample of 10 customers leaving the store

Sample B: A random sample of 100 customers leaving the store

For questions 23 -25, use the following data: 104, 97, 86, 54, 86, 93, 86, 74, 100, 90

23. What is the mean?

24. What is the mean absolute deviation (MAD)?

25. Data set A has a MAD of 10. Data set B has a MAD of 25. In general, what does this tell you about the data?

a. Data set A has a greater variability of data than data set B.b. Data set B has a greater variability of data than data set A.c. The MAD does not tell us anything about the variability of data.

Indicator 31

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Indicator 32

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