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A traffic engineer is interested in the speed that motorists drive along a certain segment of road. A sample of vehicles was clocked to the nearest mph throughout the day, with the following results: ⚫29 .35 .36 -20 .23 37 .34 .31 -24 .30 -40 28 +35 .46 .32 +38 .30 •34 .37 $28 .32 .33 .42 .32 .36 50 .34 +39 53 .30 .36 35 .33 .15 •26 .34 .36 .35 .41 .44 . a. b. 15-63 38mph . C. ⚫d. What is the range? Construct a frequency distribution, with w=3. (Begin with interval 15-17). Please include class intervals, exact limits, f, cf, f%, cf%. Construct either a bar graph or histogram (which is appropriate?). Please comment on the type and shape of the distribution. Compute the mean. Determine the median. Construct a box plot, computing Q₁ & Q3, RUB and RLB. . e. . f. Determine the mode. • g. th. i. j. k. Compare the distance from Qi to Q2 with the distance from Q2 to Q3. The pattern suggests what type of skewness? Please explain. Compute the variance, using the deviation score formula. Compare, using the raw score formula. What is the standard deviation of this distribution. What does this number mean?

A traffic engineer is interested in the speed that motorists drive along a certain segment of road. A sample of vehicles was clocked to the nearest mph throughout the day, with the following results: ⚫29 .35 .36 -20 .23 37 .34 .31 -24 .30 -40 28 +35 .46 .32 +38 .30 •34 .37 $28 .32 .33 .42 .32 .36 50 .34 +39 53 .30 .36 35 .33 .15 •26 .34 .36 .35 .41 .44 . a. b. 15-63 38mph . C. ⚫d. What is the range? Construct a frequency distribution, with w=3. (Begin with interval 15-17). Please include class intervals, exact limits, f, cf, f%, cf%. Construct either a bar graph or histogram (which is appropriate?). Please comment on the type and shape of the distribution. Compute the mean. Determine the median. Construct a box plot, computing Q₁ & Q3, RUB and RLB. . e. . f. Determine the mode. • g. th. i. j. k. Compare the distance from Qi to Q2 with the distance from Q2 to Q3. The pattern suggests what type of skewness? Please explain. Compute the variance, using the deviation score formula. Compare, using the raw score formula. What is the standard deviation of this distribution. What does this number mean?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.3: Using Data Displays
Problem 2C
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A traffic engineer is interested in the speed that motorists drive along a certain segment of road. A sample of vehicles was clocked to the nearest mph throughout the day, with the following results: ⚫29 .35 .36 -20 .23 37 .34 .31 -24 .30 -40 28 +35 .46 .32 +38 .30 •34 .37 $28 .32 .33 .42 .32 .36 50 .34 +39 53 .30 .36 35 .33 .15 •26 .34 .36 .35 .41 .44 . a. b. 15-63 38mph . C. ⚫d. What is the range? Construct a frequency distribution, with w=3. (Begin with interval 15-17). Please include class intervals, exact limits, f, cf, f%, cf%. Construct either a bar graph or histogram (which is appropriate?). Please comment on the type and shape of the distribution. Compute the mean. Determine the median. Construct a box plot, computing Q₁ & Q3, RUB and RLB. . e. . f. Determine the mode. • g. th. i. j. k. Compare the distance from Qi to Q2 with the distance from Q2 to Q3. The pattern suggests what type of skewness? Please explain. Compute the variance, using the deviation score formula. Compare, using the raw score formula. What is the standard deviation of this distribution. What does this number mean?
Transcribed Image Text:A traffic engineer is interested in the speed that motorists drive along a certain segment of road. A sample of vehicles was clocked to the nearest mph throughout the day, with the following results: ⚫29 .35 .36 -20 .23 37 .34 .31 -24 .30 -40 28 +35 .46 .32 +38 .30 •34 .37 $28 .32 .33 .42 .32 .36 50 .34 +39 53 .30 .36 35 .33 .15 •26 .34 .36 .35 .41 .44 . a. b. 15-63 38mph . C. ⚫d. What is the range? Construct a frequency distribution, with w=3. (Begin with interval 15-17). Please include class intervals, exact limits, f, cf, f%, cf%. Construct either a bar graph or histogram (which is appropriate?). Please comment on the type and shape of the distribution. Compute the mean. Determine the median. Construct a box plot, computing Q₁ & Q3, RUB and RLB. . e. . f. Determine the mode. • g. th. i. j. k. Compare the distance from Qi to Q2 with the distance from Q2 to Q3. The pattern suggests what type of skewness? Please explain. Compute the variance, using the deviation score formula. Compare, using the raw score formula. What is the standard deviation of this distribution. What does this number mean?
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