descriptive statistics
An expert who works for a car magazine obtained random data (rounded to the nearest thousand) among two categories of used or new cars: Domestic Foreign
The expert would like to understand sales based on list price (rounded to the nearest thousand dollars), sale price (rounded to the nearest thousand dollars), and number of days it takes to sell each car. The complete data set is in the file named Cars.
Managerial Report
Prepare a report (see below) that summarizes your assessment of the nature of the car market. Be sure to include the following seven items in your report.
Calculate descriptive statistics (mean, median, range, standard deviation, and coefficient of variation) to summarize each of the three variables for the all Domestic cars.
How can one use the above descriptive statistics to understand the Domestic car market better?
Descriptive statistics (mean, median, range, standard deviation, and coefficient of variation) to summarize each of the three variables for the all Foreign cars.
Use z-scores to determine if there any outliers in the data set for any of the three variables.If there are any outliers in any category, please list them and state for which category they are an outlier.If a result is an outlier, state whether it is below or above the mean.
Compare your summary results from #1 and #2. Discuss any specific statistical results that would help the car expert understand the two-car markets.
Interpret what each confidence intervals means. How can both confidence intervals provide useful car sales information?What other confidence interval would you choose to compute to obtain more information related to Domestic car sales? Explain why.
Assume the car expert requested estimates of the mean number of days to sell for the Domestic cars with a margin of error of seven days and the mean selling price of foreign cars with a margin of error of eight days.
Write a report that adheres to the formatting and APA expectations outlined on the
Citing & APA Resources page (Links to an external site.)
in the CSU-Global Writing Center. As with all written assignments at CSU-Global, you should have in-text citations and a reference page.
Domestic Cars
List
Sale
Price in Price in Days to
K
K
Sell
Car
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
9
34
23.9
29.7
26.7
31.2
22.7
8
18.3
43.9
49.1
8.7
23.2
17.1
15.3
39.7
12.4
42.3
25
36.2
13.9
18.7
39.5
23
32
34.9
43.6
6.9
43.6
12
8.7
7.2
39.6
16.5
43.9
47.6
21.3
29.5
18.6
46.6
8
11.2
8.3
30.2
19.3
28.8
24.1
31.2
20.2
4
14.9
42.9
47.1
5.4
18.3
13.4
14.5
35.2
9.2
40.3
24.2
34.8
12.1
15.6
36.6
22.1
31
33.1
39.2
4.7
41.8
9.6
6.1
5.3
36
16.2
40.8
46.2
21
26.9
16.2
46
6.1
8.6
40
5
48
12
28
30
24
42
29
16
23
17
30
15
40
31
27
58
19
30
37
43
44
55
40
22
56
28
47
44
13
15
47
21
45
5
44
6
47
60
14
13
Foreign Cars
List
Sale
Price in Price in Days to
K
K
Sell
36.7
52
11.1
48.1
6.8
7.5
71.5
21.7
59.5
19.1
67
79.2
29.3
69.1
63.9
54.5
61.4
70.8
29.2
26.6
11.7
12.2
51.6
48.8
33.9
82.3
75.9
44.1
30.5
56.5
88.3
51.8
25.7
34.2
75.8
75.5
40
67
16
50.2
85.1
73
34.1
51.5
9.6
45.9
4.5
6.5
70.8
21.7
59.1
17.7
64.3
76.1
24.9
66
58.9
51.2
56.4
69.8
28.4
23.9
9
8.5
50.6
48.4
32.4
77.8
71.8
39.7
27.7
52.3
88
50.8
21.6
33.1
75.3
73.5
39.6
66.2
15
46.1
83.8
71.2
39
26
27
52
53
39
59
51
40
15
46
62
32
55
15
46
20
24
5
44
58
11
36
24
31
51
21
17
35
19
18
46
8
42
24
25
55
50
22
40
52
22
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
33.8
10.1
13.9
48.4
13.5
6.4
38.3
38.5
36.9
18.6
4.5
25.4
59.9
44
19.8
12.6
35
52.2
38.6
24
45
52.9
52.3
50.9
18.3
34.3
50.1
57.4
9.2
36.9
41.1
43.3
46.8
51.7
13.3
57.3
59.6
18.3
42.1
13.8
32.9
54
34.4
23.6
4.7
59
26.5
32.6
7.2
13.6
44.5
13.1
4.2
38.2
37.7
36.4
14.1
3.1
22.5
57.3
40.5
18.3
10.1
31.8
49.9
36.6
23.3
44.1
47.9
50.6
47.5
16.3
29.5
48.6
56.4
6.5
33.3
38.2
40.7
42.7
47
8.7
54.3
54.6
14.9
41
9.2
31.3
52.8
31.2
22.6
4
58.2
24.5
28
30
15
28
46
45
37
40
43
25
47
38
58
53
18
20
11
49
50
18
31
16
30
25
5
55
17
49
58
35
36
6
28
11
19
14
9
33
59
49
7
25
9
42
5
38
39
15
12.9
26.3
29.8
65.7
21.8
44.3
78.6
50
57.1
46.6
82.2
61.1
81
77.1
34.4
23
54.9
82.2
79
23.5
76.2
33
48.7
34
75.8
35.2
22.9
82.8
63.8
46.4
58.7
64
87.1
75
17
39.6
63.8
25.5
79.8
13.1
34.3
71.2
29.5
23.4
12.6
15.5
11.6
10.6
22
28.5
62.4
19.4
40.5
77.2
49.2
53.8
45.6
78.6
58.3
78.9
75.3
29.4
22.5
53.9
81.3
74.6
19.3
72.5
31.5
46.7
33.8
74
35
22.4
79.3
63.8
41.5
57.8
63.3
86.1
70.6
14.4
36.4
62.9
22.2
76.6
11.5
32.7
68.5
25.4
21.6
9.5
14
37
32
27
16
4
43
9
61
45
23
58
66
61
35
44
23
4
57
66
24
28
62
51
49
27
19
22
64
29
50
50
37
57
50
38
31
13
23
24
27
21
49
16
47
7
39
16
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
34.5
24.5
3.9
5
58.3
33.6
45.6
38.8
35.6
17
18
58.5
20.9
32.5
19
4.4
67.6
59.2
25
55.7
25.7
49.1
67.7
45
48.6
25.9
37.8
25.7
27.3
65
58.3
8.6
40
3.9
21.2
36
36.2
67.4
24
10
36.4
38.4
32.7
11.9
8.7
13.5
18.3
30.8
20.5
1.9
4.8
58.1
32.1
42.7
34.9
34.2
12
15.5
55.4
19.9
32.1
14.4
4
67.4
54.3
21.7
52.8
23.9
44.7
66.3
41
43.6
25.7
37
20.8
24.8
64.2
56.9
4.6
37
3
19.3
35.1
33.8
66.3
21
8.8
36.4
37.5
28
11
5.5
10.5
14.8
48
56
34
31
30
18
9
18
47
28
51
50
48
6
35
27
39
57
25
62
62
29
28
65
63
55
50
31
51
30
57
62
33
20
54
23
51
17
19
49
11
46
44
11
17
33
12
60
20.9
81.8
89
38.1
15.5
60.3
64.2
52.2
4.9
41.3
64.6
49.6
46.4
51.8
78.8
55.2
21
32.5
43.5
11.9
15.1
50.1
81.2
83.8
68
54.4
54.5
4.9
30.7
45
20.4
24
79.1
22.8
66
88.1
8.6
38.3
52.1
23.7
67.1
63.4
45.9
77.3
46.5
63.9
59.4
17.1
79.8
84.1
35
12.7
58.4
63.1
49.5
3.3
41.2
63.5
45.6
42.4
49
77.6
54.7
17.3
30.5
43
9.5
10.4
48.7
79.7
79.1
65.1
50.8
51.4
1.3
29
40.4
17.4
23.9
78.4
18.2
65.8
85.6
3.8
35.1
49.1
20.7
63.3
61.3
41
74.4
42.6
60
4
12
45
56
39
51
21
8
18
26
18
19
47
41
54
60
21
43
67
3
65
14
45
36
35
28
14
12
57
50
60
11
5
53
31
24
31
60
60
49
6
38
33
10
25
27
56
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
3.8
67.3
24.7
29
12.4
26.4
24.2
59
18.7
29.6
46.9
59.9
38.7
35.7
34.4
32
22.8
16.9
9
63.8
10.2
52.8
42.1
9.6
17.8
48
67.3
29
13.9
18.2
54.9
78.8
10.5
21.7
7.9
25.1
22.4
62.8
73.1
21.1
50.8
18.5
41
56.9
60.5
56.9
20
3
65.3
22.2
29
11.4
21.9
19.2
55
16.7
28.4
46.5
57.7
35.6
32.2
33.6
27.1
18.1
16.2
4.2
59.4
5.3
51.8
39.6
7.2
14.2
46.3
63
25
11.3
16.1
53.5
76.5
8.4
17.8
7.1
23.8
17.5
58.3
68.3
20.7
46.4
18.4
36.7
53.6
60.3
55.1
17
37
53
53
16
54
8
70
60
40
37
69
10
33
45
60
43
43
56
28
46
54
48
22
58
59
30
11
65
49
35
67
67
17
24
29
34
23
18
8
18
41
43
11
50
13
42
13
83.2
5.4
9
78.2
27.3
67
84.1
77.7
51.7
79
50
30.5
49.8
59.8
17.4
32.1
41.1
54.1
13.6
43
85.8
35.6
25
8.8
41.8
20.4
60.3
68
65
11.3
37.5
88.3
62.8
71.8
86.5
71.8
47.1
89.3
75
69.6
87.4
24.7
73.9
80.6
89.1
55
24.7
81.3
1.7
6.4
74.2
25.3
62.8
82.1
73.9
51.4
74.5
46.1
29.7
49.7
59.1
15.7
31.2
38.1
53.1
10.8
39.3
82.9
32.6
22.7
4.4
39.5
19.4
59
64.5
61.3
9
32.9
87.7
58.2
69.2
84.6
67.3
45.2
85.7
70.1
66.8
83.5
22.6
72.6
79.1
87
54.3
22.4
62
55
61
66
3
14
44
15
38
33
10
29
47
17
67
54
54
59
62
45
56
53
9
50
26
23
22
68
66
4
22
30
28
59
53
46
65
11
28
11
16
15
14
15
56
71
57
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
19.5
25.5
50.4
73.1
18.5
71.3
69
60.8
19.7
21.9
9.4
34.9
21.9
27.4
14.3
5.2
14.3
18.2
20.9
50
70.8
15.7
66.4
66.9
57.8
18.7
19
8.6
32.6
21.3
23.3
11.7
3.8
10.9
5
53
15
41
54
4
26
15
13
1
2
5
13
12
1
3
7
4.8
84.2
86.9
85.7
40.8
57.2
6.5
79.1
14.6
1.1
5
8
27
14.8
54.4
89.5
11.5
2.3
81.8
83.5
81
38.9
53.5
5.5
76.1
12.2
0.8
4
4.9
22
11.9
53.6
87.1
7.6
39
14
19
39
51
56
41
29
1
2
14
30
18
11
15
100
14
