Question

The following sample observations were randomly selected.
**(Round intermediate calculations and final answers to 2
decimal places.)**

x |
3 | 5 | 3 | 6 | 7 |

y |
3 | 6 | 5 | 7 |
7 |

A. The regression equation is Y= ____ + ____X

B When X is 6 this gives y=______

Answer #1

a)

X | Y | X * Y | X^2 | |

3 | 3 | 9 | 9 | |

5 | 6 | 30 | 25 | |

3 | 5 | 15 | 9 | |

6 | 7 | 42 | 36 | |

7 | 7 | 49 | 49 | |

Total | 24 | 28 | 145 | 128 |

Equation of regression line is Ŷ = a + bX

b = ( 5 * 145 - 24 * 28 ) / ( 5 * 128 - 24^{2} )

b = 0.83

a =( 28 - ( 0.83 * 24 ) ) / 5

a = 1.62

Equation of regression line

**
= 1.62 + 0.83 X**

b)

When X = 6

y = 1.62 + 0.83 * 6

**y = 6.60**

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.
(Round intermediate calculations and final answers to 2
decimal places.)
Regression equation is-
When X gives 6 this gives-
x
3
5
3
6
7
y
3
6
5
7
7

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

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

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

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 =_________

The following sample observations were randomly selected:
(Round the final answers to 4 decimal places.)
X:
11
9
9
7
8
5
6
10
Y:
8
9
19
11
13
5
24
9
a. Determine the 95% confidence interval for
the mean predicted when X = 13.
[ , ]
b. Determine the 95% prediction interval for an
individual predicted when X = 13.
[ , ]

The following sample observations were randomly selected:
(Round the final answers to 4 decimal places.)
X:
11
9
9
7
8
5
6
10
Y:
8
9
19
11
13
5
24
9
a. Determine the 95% confidence interval for
the mean predicted when X = 13.
[ ? , ? ]
b. Determine the 95% prediction interval for an
individual predicted when X = 13.
[ ? , ? ]

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 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 = ??

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