Ch 8 FRO The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard deviation of 7.2 mph. In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical ines at the mean and each whole number standard deviation above and below the mean. Write two rows of numbers under the base line; one row with the number of standard deviations above and below the mean (z-scores), and a row under that with the actual values for this problem. What percent of drive would you expect to have speeds below 199.2 mph ? Show all work. What is the area under the curve to the left of a speed of 170.4mph ? Show all work.

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Ch 8 FRO
The distribution of average speeds of the top 53 drivers in NASCAR is
roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard
deviation of 7.2 mph.
In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical
ines at the mean and each whole number standard deviation above and below the mean.
Write two rows of numbers under the base line; one row with the number of standard
deviations above and below the mean (z-scores), and a row under that with the actual
values for this problem.
What percent of drive would you expect to have speeds below 199.2 mph ?
Show all work.
What is the area under the curve to the left of a speed of 170.4mph ? Show
all work.
Transcribed Image Text:Ch 8 FRO The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard deviation of 7.2 mph. In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical ines at the mean and each whole number standard deviation above and below the mean. Write two rows of numbers under the base line; one row with the number of standard deviations above and below the mean (z-scores), and a row under that with the actual values for this problem. What percent of drive would you expect to have speeds below 199.2 mph ? Show all work. What is the area under the curve to the left of a speed of 170.4mph ? Show all work.
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