Question

Do heavier cars really use more gasoline? suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds) and let y be the miles per gallon (mpg). The following information is based on data taken from consumer reports (Vol. 62, No.4). If you use the least-square line to find the estimated response value y^ at x=38 (hundred pounds), then the y^ value in this question is ____

X | 27 | 44 | 32 | 47 | 23 | 40 | 34 | 52 |

Y | 30 | 19 | 24 | 13 | 29 | 17 | 21 | 14 |

Answer #1

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in
hundreds of pounds), and let y be the miles per gallon
(mpg).
x
25
46
32
47
23
40
34
52
y
29
20
23
13
29
17
21
14
Complete parts (a) through (e), given Σx = 299,
Σy = 166, Σx2 = 11,963,
Σy2 = 3706, Σxy = 5781, and
r ≈ −0.932.
(c) Find...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in hundreds of
pounds), and let y be the miles per gallon (mpg).
x
27
43
31
47
23
40
34
52
y
30
20
25
13
29
17
21
14
Complete parts (a) through (d), given Σx = 297, Σy = 169, Σx2 =
11,737, Σy2 = 3861, Σxy = 5845, and r ≈ −0.944.
(a) Verify...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in hundreds of
pounds), and let y be the miles per gallon (mpg). x 30 44 33 47 23
40 34 52 y 33 21 22 13 29 17 21 14 Complete parts (a) through (e),
given Σx = 303, Σy = 170, Σx2 = 12,123, Σy2 = 3950, Σxy = 6040, and
r ≈ −0.853.
(a) Draw...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in hundreds of
pounds), and let y be the miles per gallon (mpg). x 27 43 29 47 23
40 34 52 y 31 18 27 13 29 17 21 14 Complete parts (a) through (e),
given Σx = 295, Σy = 170, Σx2 = 11,617, Σy2 = 3950, Σxy = 5794, and
r ≈ −0.951. (a) Draw...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in
hundreds of pounds), and let y be the miles per gallon
(mpg).
x
27
46
30
47
23
40
34
52
y
30
20
25
13
29
17
21
14
Complete parts (a) through (e), given Σx = 299,
Σy = 169, Σx2 = 11,943,
Σy2 = 3861, Σxy = 5880, and
r ≈ −0.923.
(b) Verify...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in
hundreds of pounds), and let y be the miles per gallon
(mpg).
x
28
42
29
47
23
40
34
52
y
30
17
24
13
29
17
21
14
Complete parts (a) through (e), given Σx = 295,
Σy = 165, Σx2 = 11,587,
Σy2 = 3701, Σxy = 5650, and
r ≈ −0.945.
(a) Draw...

Do heavier cars really use more gasoline? Suppose a car is
chosen at random. Let x be the weight of the car (in hundreds of
pounds), and let y be the miles per gallon (mpg).
x2544344723403452
y3017271329172114
Complete parts (a) through (e), given Σx = 299, Σy = 168, Σx2 =
11,915, Σy2 = 3854, Σxy = 5816, and
r ≈ −0.943.
(a) Draw a scatter diagram displaying the data.
Selection Tool
Line
Ray
Segment
Circle
Vertical Parabola
Horizontal Parabola...

Using the data below, determine if a heavier car uses more
gasoline. If it does, determine the equation for the best fit line.
If appropriate, predict the miles per gallon of a car that weighs
37 hundred pounds.
Weight (in
hundred pounds)
27
44
32
47
23
40
34
52
Miles per Gallon
(mpg)
30
19
24
13
29
17
21
14

Please show formulas in excel Do heavier cars really use more
gasoline? Suppose a car is chosen at random. Let x be the weight of
the car (in hundreds of pounds), and let y be the miles per gallon
(mpg). x 29 46 33 47 23 40 34 52 y 29 22 24 13 29 17 21 14 Complete
parts (a) through (e), given Σx = 304, Σy = 169, Σx2 = 12,244, Σy2
= 3837, Σxy = 6045, and...

10. Suppose a car is chosen at random. Let X be the weight of
the car (in hundreds of pounds) and let Y be the miles per
gallon.
X
Y
27
30
44
19
32
24
47
13
23
29
40
17
34
21
52
14
a. Find b (the slope of the line of best fit)
___________________
b. Find a (the y-intercept of the line of best fit)
___________________

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 28 minutes ago

asked 29 minutes ago

asked 39 minutes ago

asked 42 minutes ago

asked 45 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago