Question

1 | 2 | 3 | 4 | 5 | |

X | 7 | 20 | 6 | 17 | 20 |

Y | 7 | 19 | 11 | 9 | 3 |

The following sample observations were randomly selected:

1. Determine the regression equation. (Negative answers should be indicated by a minus sign. Do not round intermediate calculations. Round the final answer to 4 decimal places.)

b= a=

Y'= ------ + ------ X

2. Determine the value of Y' When X is 20. (Do not round intermediate calculations. Round the final answer to 4 decimal places.)

Answer #1

x
7
0
3
4
3
1
y
6
2
6
5
6
7
Assuming that the regression equation is y = 4.433 + 0.300x and
that the SSE = 12.6333, test to determine if the slope is not equal
to zero using alpha = 0.10
a) Test Statistic T = ______ (round to two decimal places)
b) Critical value(s) = _______, _______ (round to 3 decimal
places)
c) P-value = ______

Consider the following sample of 8 observations on X and Y:X: 4
19 2 17 16 20 7 20 Y: 25 22 19 14 3 4 20 9 (a) Determine the
coefficient of correlation between Y and X. (b) Determine the
coefficients (i.e., the a and b values) of the regression equation
Y = a + bX. (c) Interpret the values of the coefficients a and
b.

A consumer buying cooperative tested the effective heating area
of 20 different electric space heaters with different wattages.
Here are the results.
Heater
Wattage
Area
1
1,560
231
2
670
63
3
1,530
222
4
1,280
150
5
1,220
200
6
1,280
203
7
940
118
8
1,970
314
9
1,000
111
10
1,460
197
11
1,340
103
12
530
63
13
590
89
14
1,410
229
15
2,090
235
16
1,590
230
17
810
72
18
1,440
185
19...

Given are five observations for two variables, x and
y.
x i
1
2
3
4
5
y i
4
7
6
12
14
Round your answers to two decimal places.
a. Using the following equation:
Estimate the standard deviation of ŷ* when x =
4.
b. Using the following expression:
Develop a 95% confidence interval for the expected value of
y when x = 4.
to
c. Using the following equation:
Estimate the standard deviation of an individual value...

The following sample observations were randomly selected.
(Do not round the intermediate values. Negative amount
should be indicated by a minus sign. Round your answers to 3
decimal places.)
X:
5
5
2
6
10
Y:
4
6
5
5
7
Determine the 0.99 confidence interval for the mean predicted
when x = 7.

The following samples of observations were randomly
selected.
x:
5
3
6
3
4
4
6
8
y:
13
15
7
12
13
11
9
5
Determine the regression equation.
Determine the value of y when x is 7.

The following sample observations were randomly selected.
(Round intermediate calculations and final answers to 2
decimal places.)
x
7
5
3
6
10
y
4
6
3
7
7
1. The regression equation is y= ___ + ____x
2. When X is 9 this gives y=____

The following sample observations were randomly selected.
x
5
3
6
3
4
4
6
8
y
13
15
7
12
13
11
9
5
Click here for the Excel Data File
Determine the coefficient of correlation and the coefficient of
determination. Interpret the association between x and
y. (Round your coefficient of determination to 4
decimal places. Round all other answers to 2 decimal places.
Negative amounts should be indicated by a minus sign.)
x
y
x−x¯x-x¯
y−y¯y-y¯
(x−x¯)2x-x¯2...

the following sample observations were randomly selected x: 2 5
3 6 10 AND y: 4 2 5 7 7 the regression equation is y = (blank) +
(blank) x when X is 8 this gives y = ??

The following sample observations were randomly selected.
(Round intermediate calculations and final answers to 2
decimal places.)
x
4
5
3
7
10
y
4
3
5
7
7
a.The regression equation is ŷ =________+__________x
b.When X is 8 this gives ŷ =_________

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 4 minutes ago

asked 6 minutes ago

asked 27 minutes ago

asked 31 minutes ago

asked 31 minutes ago

asked 42 minutes ago

asked 45 minutes ago

asked 51 minutes ago

asked 53 minutes ago

asked 54 minutes ago

asked 1 hour ago