Question

The data in part (a) represent average annual hours lost per person and average annual gallons...

The data in part (a) represent average annual hours lost per person and average annual gallons of fuel wasted per person in traffic delays. Suppose that instead of using average data for different cities, you selected one person at random from each city and measured the annual number of hours lost x for that person and the annual gallons of fuel wasted y for the same person.

x (hr) 24 4 22 40 19 29 2 35
y (gal) 61 8 11 51 23 35 4

70

Verify that Σx = 175, Σx2 = 5107, Σy = 263, Σy2 = 13,177, and Σxy = 7688.

Compute r.

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

4 12.32 16 151.7824 49.28
5 13.1 25 171.61 65.5
6 16.68 36 278.2224 100.08
7 20.26 49 410.4676 141.82
8 22.44 64 503.5536 179.52
9 22.72 81 516.1984 204.48
10 23.4 100 547.56 234
11 26.98 121 727.9204 296.78
12 28.66 144 821.3956 343.92

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time...
Fuming because you are stuck in traffic? Roadway congestion is a costly item, both in time wasted and fuel wasted. Let x represent the average annual hours per person spent in traffic delays and let y represent the average annual gallons of fuel wasted per person in traffic delays. A random sample of eight cities showed the following data. x (hr) 29 5 21 36 19 20 19 5 y (gal) 46 3 31 56 32 36 27 9 (a)...
x (hr) 28 5 22 38 22 25 15 5 y (gal) 49 3 32 57...
x (hr) 28 5 22 38 22 25 15 5 y (gal) 49 3 32 57 35 35 27 9 Verify that Σx = 160, Σx2 = 4096, Σy = 247, Σy2 = 9943, and Σxy = 6352. Compute r.
Let x be per capital income in thousands of dollars. Let y be the number of...
Let x be per capital income in thousands of dollars. Let y be the number of medical doctors per 10,000 residents. Six small cities in Oregon gave the following information about x and y. x 8.9 9.5 10.5 8.0 8.3 8.7 y 9.8 18.4 21.8 10.2 11.4 13.1 Complete parts (a) through (e), given Σx = 53.9, Σy = 84.7, Σx2 = 488.29, Σy2 = 1315.45, Σxy = 781.11, and r ≈ 0.914. (a) Draw a scatter diagram displaying the...
Let x be the average number of employees in a group health insurance plan, and let...
Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 34 74 y 40 35 30 28 16 Use a calculator to verify that Σx = 133, Σx2 = 6915, Σy = 149, Σy2 = 4765, and Σxy = 2951. Compute r. (Round your answer to three decimal places.)
An economist is studying the job market in Denver area neighborhoods. Let x represent the total...
An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y represent the number of entry-level jobs in the same neighborhood. A sample of six Denver neighborhoods gave the following information (units in hundreds of jobs). x 17 30 48 28 50 25 y 3 4 7 5 9 3 Complete parts (a) through (e), given Σx = 198, Σy = 31, Σx2 = 7402,...
In baseball, is there a linear correlation between batting average and home run percentage? Let x...
In baseball, is there a linear correlation between batting average and home run percentage? Let x represent the batting average of a professional baseball player, and let y represent the player's home run percentage (number of home runs per 100 times at bat). A random sample of n = 7 professional baseball players gave the following information. x 0.255 0.249 0.286 0.263 0.268 0.339 0.299 y 1.0 3.5 5.5 3.8 3.5 7.3 5.0 (b) Use a calculator to verify that...
How much should a healthy Shetland pony weigh? Let x be the age of the pony...
How much should a healthy Shetland pony weigh? Let x be the age of the pony (in months), and let y be the average weight of the pony (in kilograms). x 3 6 12 16 24 y 60 95 140 150 189 Use a calculator to verify that x = 61,  x2 = 1021,  y = 634,  y2 = 90,446,  and   xy = 9,366. Compute r. (Round your answer to three decimal places.) Let x be the average number of employees in a group health...
Let x be the average number of employees in a group health insurance plan, and let...
Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 37 72 y 40 35 30 28 17 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. (b) Would you say the correlation is low, moderate, or strong? positive or negative? low and positivemoderate and negative    strong and positivestrong and negativelow...
Let x be the average number of employees in a group health insurance plan, and let...
Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 38 73 y 40 35 30 25 20 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. (b) Would you say the correlation is low, moderate, or strong? positive or negative? low and negativemoderate and positive     strong and negativestrong and positivelow...
Let x be the average number of employees in a group health insurance plan, and let...
Let x be the average number of employees in a group health insurance plan, and let y be the average administrative cost as a percentage of claims. x 3 7 15 30 71 y 40 35 30 27 17 (a) Make a scatter diagram of the data and visualize the line you think best fits the data. (b) Would you say the correlation is low, moderate, or strong? positive or negative? strong and positivelow and positive     moderate and positivestrong and negativelow...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT