Question

**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 the variance?

What is the standard deviation?

Answer #1

Using R, answer the following question. The accompanying data
set contains quiz scores for 12 students in a chemistry class: 18,
15, 5, 8, 15, 20, 2, 16, 10, 12, 20, 15.
Find a measure of central tendency that separates the data into
two groups such that each group consists of 50% of the scores above
and 50% of the scores below that measure.
Find a measure of central tendency that represents the average
of the 12 quiz scores.
Find...

Here is the data set for quiz scores for the students who enroll
the Economics 101.
13
14
14
17
15
18
14
18
19
19
20
20
22
22
23
13
9
11
14
14
16
Find the median score of this quiz.

Here is the data set for quiz scores for the students who enroll
the Economics 101.
13
14
14
17
15
18
14
18
19
19
20
20
22
22
23
13
9
11
14
14
16
In last semester, the average score for the same quiz was 18.1.
With 90% confidence, what conclusion can be reached about how the
true current mean score compares to last year?

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)...

The table below shows the scores of a group of students on a
10-point quiz.
Test Score
Frequency
3
3
4
3
5
5
6
2
7
2
8
3
9
0
10
2
The mean score on this test is:
The median score on this test is:

The following is data for the first and second Quiz scores for 8
students in a class.
First Quiz Second Quiz
12 8
13 14
23 17
35 31
40 33
42 40
49 40
50 41
Predict the value of the second quiz score if a student had a
score of 44 on the first test.

The following data gives the scores of 13 students in a
Biostatistics exam. 75 80 28 70 95 82 75 64 61 90 81 65 91 a) Find
the following statistical measures 1. Mean 2. Median 3. Mode 4.
Range 5. 34th percentile 6. Interquartile Range 7. Variance 8.
Standard deviation PRINCIPLES OF STATISTICS Assignment (1) Due
Date: 15/7/2020 9. Coefficient of variation. b) (Without
Calculations) If the instructor decide to add up 5 marks for every
student, what are...

The following data gives the scores of 13 students in a
Biostatistics exam. 75 80 28 70 95 82 75 64 61 90 81 65 91
a) Find the following statistical measures
1. Mean
2. Median
3. Mode
4. Range
5. 34th percentile
6. Interquartile Range
7. Variance
8. Standard deviation
9. Coefficient of variation.
b) (Without Calculations) If the instructor decide to add up 5
marks for every student, what are the values of the statistical
measures mentioned in...

Here is the data set for quiz scores for the students who enroll
the Economics 101.
13
14
14
17
15
18
14
18
19
19
20
20
22
22
23
13
9
11
14
14
16
Using the five number summary, describe (1) the shape, (2)
appropriate central tendency, (3) appropriate dispersion method,
& (4) any extreme value of the data.

The following data are quiz scores for two quizzes from 8
students in a class.
First Quiz
Second Quiz
10
12
11
13
13
15
15
19
29
27
33
28
35
29
40
38
Least-squares Regression Line
1) What is the least-squares regression line? Round to three
decimal places.
ˆy=
2) Prediction
Predict the score of the second quiz if a student scored 49 on
the first quiz. Round to one decimal place.
=

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