Data About Us Study Guide

Name - ______Data About Us Study Guide Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Students in 7th grade history classes are selling magazines to go on class trips. There are 6 different history class periods that are selling magazines. Based on the chart below, which of the following statements is false?

____ 2. Compare the following years in the chart below to find the year where the difference between the male’s and female’s chin-up count was 5 chin-ups. a. 2000 b. 2002 c. 2005 d. 2006

____ 3. Anaylze this set of data to discover the mean: 25, 28, 28, 35, 8, 13, 16, 23 a. 2 b. 28 c. 18 d. 22 ____ 4. When Charlie ran 8 miles, his mean time per mile was 9.9 minutes. Conclude how long it will take Charlie to run 11 miles? a. 14.5 minutes b. 108.9 minutes c. 81.1 minutes d. 20.9 minutes

Cans of Food Collected 3 | 1 3 4 | 0 0 0 1 1 1 1 1 1 1 1 2 2 4 4 6 6 8 9 9 5 | 3 4 Key: 1 | 8 means 18 ____ 5. Using the stem-and-leaf plot above, assess what the median amount of food cans were collected for this class? a. 46.5 b. 4 c. 40 d. 41 ____ 6. Mr. Johnson’s class of 25 students collected 175 cans of food for the food drive, while Ms. Smith’s class of 20 students collected 200 cans of food. Which class’s mean number of cans of food was greater? a. Ms. Smith’s c. There isn’t enough information to tell. b. Mr. Johnsons’s d. The means are equal. ____ 7. In a survey of 7th grade girls at Saranac Middle School, the favorite male actor was Brad Pitt. Connect the statistical measure that represents this idea? a. mean b. median c. mode d. range ____ 8. A group of friends tested themselves to see how many times each person could hit a tennis ball against the wall without missing. The results are listed in data set below. Construct this data set in order from least to greatest to find the range.

14 8 22 24 35 7 35 12 7 24 16 8 16 22 12 9

a. 28 b. 35 c. 16 d. 26 ____ 9. Compare the answer choices and choose the answer that represents the data in the stem-and-leaf plot below.

3 3 4 6 8 4 1 2 4 5 5 7 9 Key: 1 3 means 13

a. c. 34, 31, 42, 64, 84, 54, 51, 72, 94 33, 34, 36, 41, 38, 42, 44, 55, 59, 57 b. d. 33, 38, 41, 44, 55, 59 33, 34, 36, 38, 41, 42, 44, 55, 57, 59

Open Ended questions - This problem requires you to show all your work and/or explain all your reasoning. You may use drawings, words, and/or numbers in your answer. Your answer should be written so that another person could read it and understand your reasoning. It is important that you show all of your work. 10. a. For this distribution, identify the median, b. For this distribution, identify the mode, identify identify the range, and tell if the data is how many people are represented by the data, categorical or numerical. and tell if the data is categorical or numerical.

11. The members of the drama club sold candy bars to help raise money for the school’s next play. The stem-and- leaf plot below shows how many candy bars each member of the drama club sold. Analyze the data to find: a. How many students are in the drama club? b. How many students sold 14 or more candy bars? c. How do the numbers of candy bars sold by each student vary?