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21.4 – 30.9 37 31.0 – 40.5 41 40.6 – 50.1 43 50.2 – 59.7 45 59.8 – 69.3 48 69.4 – 78.9 50 Based on the information, what is the cumulative relative frequency for the 50.2% – 59.7% change in tuition class? A. 45 B. 55
C. 2 D. 90 Answer Key: D Feedback: 45/50 = 90%. Asks for relative frequency not frequency. Part 7 of 8 - Scatter Plots Questions 1.0/ 2.0 Points Question 17 of 20 1.0/ 1.0 Points The Australian Institute of Criminology gathered data on the number of deaths (per 100,000 people) due to firearms during the period 1983 to 1997. The time-series plot is below. What year had the highest rate of deaths? .
A. 1997 B. 1983 C. 1989 D. 1985 Answer Key: D Feedback: 1985 along the x-axis has the highest peak along the y-axis. Question 18 of 20 0.0/ 1.0 Points A time series plot is essentially a:
B. Scatterplot C. figure D. histogram Answer Key: B Part 8 of 8 - Stem and Leaf Questions 0.0/ 2.0 Points Question 19 of 20 0.0/ 1.0 Points The following data show the height (in inches) of sample of students. 67 70 71 61 71 67 69 68 66 65 67 67 64 71 69 67 67 64 62 69 Create a stem leaf plot for these data and then select all of the correct statements about these data based on your plot.
D. 20% of students are over 69 inches tall. Answer Key: D Feedback: 70, 71, 71 and 71 are over 69 inches tall. 4/20 = 20% of students are over 69 inches tall. Stem Leaf 6 1244567777778999 7 0111 Question 20 of 20 0.0/ 1.0 Points The graph below is for pulse rates before and after exercise. Before Pulse Rates After 9 8 8 7 6 5 2 9 8 8 8 6 5 5 5 1 1 0 0 7 8 8 7 5 4 2 8 5 6 6 7 8 9 4 0 9 0 1 1 2 3 4 5 5 6 8 4 10 0 1 4 6 7 11 6 7 12 4 5 8 What was the slowest pulse rate of the after exercise group? 6
Feedback: The Leaves on the right are for Before Exercise and the Leaves on the left are for After Exercise.