All question 33 Let x be the age in years of a licensed automobile driver. Let...

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All question 33

Let x be the age in years of a licensed automobile driver. Let y be the percentage of al fatal accidents (for a given age) due to speeding. For example, the first data pair indicates that 36% of all fatal accidents of 17-year-olds are due to speeding 36 25 22 1 10 75 Complete parts (a) through (e), given ΣΧ-329, Σ~ i 17, Σ?-18,263, Sp, 2723, Σο-4089, and r r-o962. (a) Draw a scatter diagram displaying the data. Flash layer version 10 or higher is required for this question You can get Flash Player free from Adabes website (b) Verify the given sums Σ, ΣΥ. Σ. Ση,2ry and tbe value o, the sample correlation coefficient r (Round your value for r to three decimal places.) tion or g1pot.co (c) nnd x, and y. Then md the equation of the least-squares ine 슝 “ a ◆ for a and b to three decimal places.) (Round your answers for x and y to two decimal places. Round your answers

(c) Find x, and y. Then find the equation of the least-squares line y-a+bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) (a) Graph the least-squares line. Be sure to plot the point (&, y) as a point on the line. 50 40 30 40 30 20 10 10 2040 60 -10 20 40 660 10 40 30 30

10 10 30 20 10 20 40 60 20 60 -10 10 0 (e) Find the value of the coefmicient of determination2 What percentage of the variation in y can be expisined by the correspanding variation in x and the least-squares line? What percentage is unexplained (Round your answer for to three decimal places. Round your answers for the percentages to one dedimal plece) (1) Predict the percentage of all fatal accidents due to speeding for 40-year-olds. (Round your answer to two decimal places.)

math Statistics-And-Probability

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Answer 1

Answer #1

a)

Scatter plot 40 35 30 25 20 15 10 10 20 30 40 50 60 70 80 90

b)

Y 12-75- 16768 66855434 194 100 49 25 012 9-9-9-9-9 3 322 2 X271 2 ad 5 1234567-32

c)

47 16.71429

S.D 0 963 SD

d) 4th one is correct.

40 35 30 25 observed Trend line means 20 15 .Linear (Trend line) 10 0 0 10 20 30 40 50 60 70 80 90

e)

f)

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Answer 2

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