Question

The following data are to be used for answering this question

20 | 1 | 5 |

1 | 9 | 9 |

10 | 2 | 6 |

What is the variance of this **population** of
scores?

5.6 | ||

30 | ||

32 | ||

36 | ||

288 |

Answer #1

Solution :

Data : 20 , 1, 5 , 1 , 9 , 9 , 10 , 2 , 6

n = 9

mean = = x / n = (20 + 1 + 5 + 1 + 9 + 9 + 10 + 2 + 6) / 9

= 63 / 9

= 7

mean = = 7

variance =
(x -
)^{2} / n

= (20 - 7)^{2} + (1 - 7)^{2} + (5 -
7)^{2} + (1 - 7)^{2} + (9 - 7)^{2} + (9 -
7)^{2} + (10 - 7)^{2} + (2 - 7)^{2} + (6 -
7)^{2} / 9

= 288 / 9

=32

The variance of this population of scores = 32

1. Use the following data for question 1 (Suppose we have the
population data set) (3 points).
6, 9, 9, 10, 8, 9, 4, 7, 10, 9, 5, 8, 10, 6, 9, 6, 8, 8, 7,
9
-Provide a frequency distribution table
-Report the mean, mode, median, range, variance and SD
-Provide a histogram here to check the distribution shape:
Explanation:

QUESTION 9 What critical value would I used for the following
data? This data will be used to assess a two tailed evaluation with
a level of significance of 0.05. The standard deviations (or
variances) for the independent populations are not equal. Group A
Group B sample mean 5 6 variance.sample 2 9 n 42 58 t critical will
be _______________ (to three decimal places)

The following data set represents students' scores on a
quiz. The best possible score was a 20. Use the data to generate
answers to the next eight (8) questions (Q28-Q35).
4, 4, 10, 12, 2, 20, 5, 12, 12, 5, 9, 9, 20, 13, 6, 6,
15, 15, 15, 15
What is the mean? (Round all answers for this question to the
hundredths place - X.XX)
What is the median?
What is the mode?
What is the range?
What is...

***Just need question c answered ***
1. Use the following raw data to answer parts a and b of this
question:
Xi: 3, 7, 14, 6, 17, 8, 10, 5
a. Calculate the mean, standard deviation, and variance for the
above set of scores. Assume that the eight scores represent an
entire population, and further assume that the scores are normally
distributed.
b. Calculate the Z-score associated with each raw score.
c. Find the percentile scores which correspond to percentile...

question 1:
The following data give the time (in minutes) that each of 20
students waited in line at their bookstore to pay for their
textbooks in the beginning of Spring 2012 semester.
14
35
23
23
12
46
41
51
22
37
22
34
14
46
32
20
41
36
27
25
Construct a ranked stem-and-leaf display for the data.
Question 2:
Following are the temperatures (in ∘F) observed during eight
wintry days in a midwestern city (sample):
23 ...

USE STATSDISK if needed
Question?
"Based on this data below, create an interval for which we would
consider it "usual" for a randomly selected participant to fall
within." ?
Data Given:
1-6
2-1
3-1
4-4
5-6
6-8
7-2
8-2
9-4
10-5
11-7
12-10
13-6
14-3
15-2
16-1
17-Something
................
18-1
19-2
20-3
21-5
22-7
23-8
24-2
25-3
26-2
27-2
28-4
29-3
30-4
31-6
32-1
33-1
34-6
35-4
36-4
37-3
38-1
39-1
40-5
41-8
42-1
43-7
44-9
45-2
46-9
47-7
48-8...

Use Stats Disk if needed!!
Question=
Based on this data, create an interval for which we would
consider it "usual" for a randomly selected participant to fall
within.
1-6
2-1
3-1
4-4
5-6
6-8
7-2
8-2
9-4
10-5
11-7
12-10
13-6
14-3
15-2
16-1
17-Something
.............
18-1
19-2
20-3
21-5
22-7
23-8
24-2
25-3
26-2
27-2
28-4
29-3
30-4
31-6
32-1
33-1
34-6
35-4
36-4
37-3
38-1
39-1
40-5
41-8
42-1
43-7
44-9
45-2
46-9
47-7
48-8
49-4
..........
50-2

the
data show the bumber of vacation days used by a sample of 20
employees in a recent year. use technology to answer parts a and b.
a. find the data sets first, second, and third quartiles
b draw a bos and whisker plot that represents the data
set.
8 9 6 5 5 1 2 4 7 5 5 10 7 2 9 3 6 4 8 6

Given the following sample data set (30 quiz scores), answer
the following questions below.
1, 3, 3, 3, 4, 4, 5, 6, 6, 7, 9, 9, 9,
9, 10, 11, 12, 14, 16, 17,
17, 17, 18, 19, 21, 23, 23, 26, 26,
27,
18a. Complete
the grouped frequency
distribution. (6
points)
Q20. Q21. Q22. Q23. Q24. Q25.
Interval Real
limits Midpoint f Cf r% c%
1-5
6-10
11-15
16-20
21-25
26-30
Q26.
18b. What score is associated
with the 90th
percentile? (1
point)
Q27.
18c. What percentage of scores
fall between (and including)...

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1, 1, 7, -5, 3, -2, 1, -9, 2, 86
a) What is the variance of the sample data?
Round your response to at least 3 decimal places.
b) If the outlier is removed, what is the variance of the
remaining sample data?
Round your response to at least 3 decimal places.

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