2. If 600 Flowers Are to Be Ordered by the Store, How Many Should Be Daisies?______

Name:______Date:______Period:______

Unit 4 – Inferences

1.  A store sells 4 types of flowers. The people who work in the store survey customers at random to see what their favorite type of flower is. Their preferences are indicated in the table below. What is the sample size? ______

Type / Number
Tulips / 25
Roses / 10
Daisies / 8
Sunflowers / 7

2.  If 600 flowers are to be ordered by the store, how many should be daisies?______

3.  The cheerleading coach is trying to plan for tryouts. She knows that she can look at the past few years to see how many people have tried out and use this data to plan. The results are as follows:

25 / 20 / 32 / 28 / 38 / 26 / 25 / 28 / 30

a.  Find the mean and mean absolute deviation. (Round to the nearest tenth, if necessary.)

4.  The box-and-whisker plot shows the test scores of two students.

a.  Which student has the greater range of test scores? ______

b.  100% of Amy’s tests are better than ______% of Ed’s scores.

5.  Label the box plot below using the five number summary definition.

6.  A. ______% of the data in a box and whisker plot is between the lower quartile and the upper extreme.

B. ______% of the data in a box and whisker plot is between the lower quartile and the upper quartile.

7 – 13.

14-17. The number of text messages 10 different students sent in 1 day is shown in the box and whisker plot is shown below.

18. What is the interquartile range? ______Range?______

What percent of the data is in the interquartile range? ______

19. Identify the upper and lower extremes, upper and lower quartiles, and the median

of the box and whisker plot below

20. Seventy five percent of the data is below what number? ______

21. Why is the box bigger between 50 and 72 in the box and whisker plot above?

22. How do you find the mean absolute deviation of a set of data?