Unit 2A Quiz
Name:________________________________
Find the mean, median, mode, and range for each data set.
1. weights of books (oz): 12 10 9 15 16 10
2. golf scores: 98 96 98 134 99
Mean:_____________
Median:____________
Mode:_____________
Range:____________
Mean:_____________
Median:____________
Mode:_____________
Range:_____________
1 b. Which measure of central tendency would you use to describe the data? Why: 2b. Which measure of central tendency would you use to describe the data? Why: 3. I scored the following scores on my quizzes so far this nine weeks: 99, 86, 76, 95. If I want to have a quiz average of a 91, what must my next quiz score be? 4. Noah said 10 was the range of the data set 2, 10, 8, and 3. Payton said that the range was 8. Which student is correct? Explain your choice. Correct Student: __________________________ Explanation: 5. What measure of central tendency would you use if your data set included an extreme value? 6.
a) Make a dot plot of the total calories: Hint: You need to have a even scale.
b) Make a histogram of the total calories:
Range of Calories
Frequency
c) Make a relative frequency histogram for total calories:
Rel. Frequency
d) Write a short description of the distribution so that a person who had not seen the distribution could draw an
approximately correct sketch of it. (Hint: I’m looking for 4 shape, outliers, center, and spread).
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7. Families were asked how many videos they rented last month. The results are indicated in the table below. a) How many families were surveyed? b) Find the median number of videos rented by these families. c) Find the mean number of videos rented by these families. 8. The histogram shows the ages of people attending the showing of a new movie. Use the histogram to answer the questions. a) What percent of moviegoers are 10 – 19? b) Circle the interval below that contains the mean age of people attending the movie. 5 – 9 years old 15 – 19 years old 30 – 34 years old c) Based on the histogram, what kind of movie do you think they are watching?