Name: ______Date______Period:______
Data About Us Unit Test REVIEW
1. Below are some of the ages of contestants who tried out for American Idol.
16 / 20 / 33 / 45 / 16 / 1820 / 26 / 27 / 35 / 30 / 31
17 / 17 / 18 / 54 / 19 / 42
45 / 32 / 26 / 21 / 24 / 37
a. Create a frequency table and a histogram for the data set.
Intervals / Tally / Frequencyb. What do you notice about the data? Where are the clusters? Are there any outliers?
2. A farmer starts 9 tomato plants in a greenhouse several weeks before spring. The seedlings look a little small this year so the farmer decides to compare this year’s growth with last year’s growth.
This year’s growth is measured in inches as:
12 8 10 10 14 8 11 13 14
a. Find the five-number summary of the data.
b. Last year, the five-number summary for the tomato plants was 9, 11, 13, 16, 17. (LE: 9, LQ: 11, M: 13, UQ: 16, UE: 17)
Create a box-and-whisker plot for each data set on the same number line. Don’t forget to label.
c. Use your box-and-whisker plots to explain whether the farmer’s concern justified? Why or why not? Use percents and/or fractions to help justify your answer.
3. A group of 16 students decided to record the number of papers they lose during a week. The number of papers lost by the students were:
0 0 20 17 8 5 9 3
7 2 6 3 0 2 1 1
a. Find the median number of papers lost during the week
b. How does the data vary?
c. What is the range of papers lost?
d. What is the mode?
e. Find the mean number of papers lost during the week.
f. What would happen to the mean if a student who originally lost 0 papers, lost his binder containing 171 pages instead?
4. Create a data set that shows the number of books 10 college student must buy each semester. The median number of books is 8 and the number of books vary from 2 to 23.
5. Nine families document the number of time they go out to eat in a month. The mean number of time the families eat out is 6 times. Create a data set that represents this situation.
6. Below are the box plots for Mrs. Choy’s classes.
a. How do the box plots compare?
b. If you were Mrs. Choy, which class would you think did better on the Quiz? Why?