Question

- A simple random sample of 31 cans of generic soda had their caffeine levels measured, in milligrams per 12 ounce serving. The data is given below. Find the 99% confidence interval estimate of the mean amount of caffeine in the entire population of this generic soda.

34 35 35 36 36 36 38 38 38 38 38 39 40 40 41 42 43 43 45 45 46 46 47 50 50 51

52 53 55 56 60

Answer #1

Sample mean =43.42

Sample standard deviation =7.045

Sample size =31

Level of significance=1-0.99=0.01

Degree of freedom =30

t critical value is (by using t table)=
2.75

Confidence interval formula is

=(39.94,46.90)

6. A simple random sample of 31 cans of generic soda had their
caffeine levels measured, in milligrams per 12 ounce serving. The
data is given below. Find the 99% confidence interval estimate of
the mean amount of caffeine in the entire population of this
generic soda.
34 35 35 36 36 36 38 38 38 38 38 39 40
40 41 42 43 43 45 45 46 46 47 50 50 51
52 53 55 56 60

2a. Describe the sample and population you are studying.
I am studying customers' satisfaction level with their
car insurance plan.
2b. Calculate the sample mean and sample standard deviation for
your variable. Keep at least four decimal places.
2c. Calculate the standard error and the margin of error for a 90%
confidence interval. Keep at least four decimal places.
Data:
36
18
66
43
28
39
47
40
24
46
48
57
36
58
39
62
43
65
74
36...

Cholesterol levels: A national health survey
measured the serum HDL cholesterol levels in a large number of
women. Following is a sample of
37
HDL levels (in milligrams per deciliter) that are based on the
results of that survey. The list has been sorted into numerical
order.
25
25
25
26
27
27
27
28
28
29
34
35
35
38
38
39
42
42
43
44
45
45
45
45
46
46
47
48
51
52
56
57
65...

The number of grams of carbohydrates in a 12-ounce serving of a
regular soft drink is listed here for a random sample of sodas
48
37 52
40 43
46 41
38
41
45 43
33 35
52 45
41
30
34 46
40 40
42 39
32
What is the point estimation for 90% confidence interval?
What is the margin error for 90% confidence interval?
Estimate the mean number of carbohydrates in all brands of soda
with 90% confidence....

Please compute the value, upper control limit, and lower
control limit for the x-bar chart, r-bar chart, p
chart, and np chart.
Sample #
Observations
Defects
1
44
49
44
44
40
0
2
42
46
51
51
42
2
3
45
45
49
49
46
2
4
40
39
42
42
47
7
5
44
51
53
53
44
2
6
41
44
43
43
46
8
7
40
44
46
46
48
3
8
54
49
48
48...

How Democratic is Georgia? County-by-county results are shown
for a recent election. For your convenience, the data have been
sorted in increasing order (Source: County and City Data Book, 12th
edition, U.S. Census Bureau). Percentage of Democratic Vote by
Counties in Georgia 31 33 34 34 35 35 35 36 38 38 38 39 40 40 40 40
41 41 41 41 41 41 41 42 42 43 44 44 44 45 45 46 46 46 46 47 48 49...

Dataset:
Husband Wife
53 50
38 34
46 44
30 36
31 23
26 31
29 25
48 51
65 46
29 26
28 23
29 32
25 22
22 21
21 24
43 50
24 27
38 33
33 26
35 29
40 29
27 25
27 24
49 38
48 39
27 27
26 24
40 34
35 37
21 26
32 39
30 28
60 52
36 40
25 23
66 55
52 34
41 40
43 ...

Using the data set (link below), please calculate a one-way
chi-square tests for President Trump approval rating for the first
years in office. Specifically run chi-square on the "Approving"
column.
This is the information provided.
Approving
Disapproving
Unsure/NoData
39
55
6
37
57
6
35
60
5
36
59
5
35
59
6
37
56
7
38
57
5
38
56
6
38
58
4
35
60
5
36
58
6
37
57
6
38
56
6
37
58
5...

How Democratic is Georgia? County-by-county results are shown
for a recent election. For your convenience, the data have been
sorted in increasing order (Source: County and City Data
Book, 12th edition, U.S. Census Bureau).
Percentage of Democratic Vote by Counties in Georgia
31
33
34
34
35
35
35
36
38
38
38
39
40
40
40
40
41
41
41
41
41
41
41
42
42
43
44
44
44
45
45
46
46
46
46
47
48
49...

The Whitcomb Company manufactures a metal ring for industrial
engines that usually weighs about 50 ounces. A random sample of 50
of these metal rings produced the following wights (in ounces).
51
53
56
50
44
47
53
53
42
57
46
55
41
44
52
56
50
57
44
46
41
52
69
53
57
51
54
63
42
47
47
52
53
46
36
58
51
38
49
50
62
39
44
55
43
52
43
42
57...

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