Data Set: 6 8 10 13 15 18 20 21 27 29 30 35 45 49 52 54 57 58 Define: mean and m
ID: 3367686 • Letter: D
Question
Data Set: 6 8 10 13 15 18 20 21 27 29 30 35 45 49 52 54 57 58 Define: mean and median.
1. mean 30.4, median 28
2. mean 28.4 , median 28
3. mean 31.4 , median 29
4. mean 30.4 , median 29
5. None of these answers
QUESTION 2
Sample: 45 71 34 88 46
For the given set of numbers, find the mean and the standard deviation.
mean: 56.8, deviation: 19.75
mean: 56.7, deviation: 22.82
mean: 57.6, deviation:21.80
mean: 56.6, deviation: 22.08
None of these answers
QUESTION 3
Find the mode(s) for the given sample data.
98, 25, 98, 13, 25, 29, 56, 98
25
42.5
55.3
98
None of these answers
QUESTION 4
A class of sixth grade students kept accurate records of the amount of time they spent playing video games during 10 days period. The times ( in hours) are listed below:
23.0 15.5 9.6 24.4 15.2 30.5 24.1 16.6 15.7 14.0
Find the range for the given data.
20.9
9.6
15.2
7.5
None of these answers
QUESTION 5
A student took three tests.
Psychology: Her score was 80
On this test the mean score was x =78, and the standard deviation was s = 4.6
Algebra: Her score was 73
On this test the mean score was x =69, and the standard deviation was s = 6.0
History: Her score was 84
On this test the mean score was x =78, and the standard deviation was s = 8.1
Using z scores, find in which class the student got relatively best results.
Psychology
Algebra
History
QUESTION 6
On a multiple-choice test, each question has 5 answers, only one of each is correct. A student makes random guessing on Questions 1, 2 and 3. What is the probability that all three answers are correct?
1/125
3/125
1/15
3/25
None of these answers
1.mean: 56.8, deviation: 19.75
2.mean: 56.7, deviation: 22.82
3.mean: 57.6, deviation:21.80
4.mean: 56.6, deviation: 22.08
5.None of these answers
Explanation / Answer
Answer 1)
mean=30.3888 and median =28
option 1 is correct
Answer 2)
mean=56.8 and standard deviation=22.083
Answer 3)
mode is most frequestly occurring data value here it is 98.
Answer 4)
Range =MAx-Min=30.5-9.6=20.9
Answer 5)
Psychology Z=(X-mean)/sd=(80-78)/4.6=0.43478
Algebra Z=(x-mean/sd=(73-69)/6=0.666
History Z=(x-mean)/sd=(84-78)/8.1=0.7407
relatively best result on History.
Answer 6)
(1/5)*(1/5)*(1/5)=1/125
option 1 is correct
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