Consider the following
small data set.
Subject
x
y
1
7
21
2
17
15
3
15
24
4
5
19
5
14
30
Find the linear correlation coefficient.
?=
Given the following
data set, let ? be the explanatory variable and ? be the response
variable.
x
7
6
3
8
2
5
3
y
3
6
7
2
8
5
8
(a) If a least squares line was fitted to this data, what
percentage of the variation in...
15-6: Consider the following set of data:
x1
10
8
11
7
10
11
6
x2
50
45
37
32
44
51
42
y
103
85
115
73
97
102
65
Obtain the estimate regression equation.
Examine the coefficient of determination and the adjusted of
determination. Does it seem that either of the independent
variables’ addition to R2 does not justify the reduction
in degrees of freedom that results from its addition to the
regression model? Support your assertions.
Conduct...
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Number of Aides Absent
5
8
11
15
4
2
7
1
4
6
14
19
3
5
8
In which of the following ranges you can find the Upper Control
Limit of the control chart?
0.1427
0.1536
0.1677
Not computable with information available
In which of the following ranges you can find the Lower Control
Limit of the control chart?
Does not exit...
student
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Test score
67
67
87
89
87
77
73
74
68
72
58
98
98
70
77
Above we have the final averages of the last stats and I want to
know if the class average falls within the boundaries of all my
statistics classes for the past 20 years.
Find the sample size, mean, and standard deviation of the data
above (Table 1)....
For the following data set, X: 9, 6, 8, 3, 8, 9, 3, 4, 3, 7:
Calculate:
1. Variance
2. Mode
3. Mean
4. Mean Average Deviation (MAD) about the mean
5. Median
3
6
4
8
1
10
2
9
11
12
15
22
3
6
7
5
8
1
12
14
Each column represents a different treatment given to sick rats.
Each cell is a different rat. Use statistical analysis and use post
hoc testing using contrasts to find the best
treatment.
Treatment 1: vitamins
Treatment 2: prescription pills
Treatment 3: brain surgery
Treatment 4: shock therapy
Treatment 5: dietary changes
Determine whether the lines ?1:?=6+3?,?=6+2?,?=13+4? and
?2:?=−11+4??=−8+4??=−13+7? intersect, are skew, or are parallel. If
they intersect, determine the point of intersection; if not leave
the remaining answer blanks empty.
Consider the data.
xi
2
6
9
13
20
yi
8
17
11
28
23
(a)What is the value of the standard error of the estimate?
(Round your answer to three decimal places.)
(b)Test for a significant relationship by using the t
test. Use α = 0.05. State the null and alternative hypotheses.
(b.1)Find the value of the test statistic. (Round your answer to
three decimal places.)
(b.2)Find the p-value. (Round your answer to four
decimal places.)
(c)State your conclusion...