Test Instructions:
- This Mock test contains 20 MCQ questions.
- Choice and sequence for attempting questions will be as per the convenience of the candidate.
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- Determine the one correct answer out of the four available options given for each question.
- Each question awards you 1 point.
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Question 1 of 20
1. Question
2 point(s)Following data gives weights of 10 students (in kgs) in a certain school. Find the range of the data.
70, 62, 38, 55, 43, 73, 36, 58, 65, 47
CorrectIncorrect -
Question 2 of 20
2. Question
2 point(s)Calculate range for the following data.
Salary(00’sRs.) No. of Employees
30-50 7
50-70 15
70-90 3090-110 24
110-130 18
130-150 11CorrectIncorrect -
Question 3 of 20
3. Question
2 point(s)Compute variance of the following data observations.
9, 12, 15, 18, 21, 24, 27CorrectIncorrect -
Question 4 of 20
4. Question
2 point(s)Compute Standard Deviation (S.D) of the following data observations.
9, 12, 15, 18, 21, 24, 27CorrectIncorrect -
Question 5 of 20
5. Question
2 point(s)Given below are the marks out of 25 of 5 students in mathematics test. Calculate the variance of these observations.
Marks : 10, 13, 17, 20, 23CorrectIncorrect -
Question 6 of 20
6. Question
2 point(s)Given below are the marks out of 25 of 5 students in mathematics test. Calculate the standard deviation of these observations.
Marks : 10, 13, 17, 20, 23CorrectIncorrect -
Question 7 of 20
7. Question
2 point(s)A die is rolled 30 times and the following distribution is obtained. Find the variance
Score (X) 1 2 3 4 5 6
Frequency (f) 2 6 2 5 10 5CorrectIncorrect -
Question 8 of 20
8. Question
2 point(s)A die is rolled 30 times and the following distribution is obtained. Find the S.D
Score (X) 1 2 3 4 5 6
Frequency (f) 2 6 2 5 10 5CorrectIncorrect -
Question 9 of 20
9. Question
2 point(s)Find the standard deviation of the following frequency distribution which gives distribution of heights of 500 plants in centimeters.
Height of plants No. of plants
(in cm)
20-25 145
25-30 125
30-35 90
35-40 40
40-45 45
45-50 35CorrectIncorrect -
Question 10 of 20
10. Question
2 point(s)The means of two samples of sizes 10 and 20 are 24 and 45 respectively and the standard deviations are 6 and 11. Obtain the standard deviation of the sample of size 30 obtained by combining the two samples.
CorrectIncorrect -
Question 11 of 20
11. Question
2 point(s)The first group has 100 items with mean 45 and variance 49. If the combined group has 250 items with mean 51 and variance 130, find the mean and standard deviation of second group.
CorrectIncorrect -
Question 12 of 20
12. Question
2 point(s)Number of patients who visited cardiologists are 13, 17, 11, 15 in four days then standard deviation (approximately) is
CorrectIncorrect -
Question 13 of 20
13. Question
2 point(s)If the observations of a variable X are, −4, −20, −30, −44 and −36, then the value of the range will be:
CorrectIncorrect -
Question 14 of 20
14. Question
2 point(s)The standard deviation of a distribution divided by the mean of the distribution and expressing in percentage is called:
CorrectIncorrect -
Question 15 of 20
15. Question
2 point(s)If the S.D. of first n natural numbers is √2 ,then the value of n must be ––––––
CorrectIncorrect -
Question 16 of 20
16. Question
2 point(s)The positive square root of the mean of the squares of the deviations of observations from their mean is called:
CorrectIncorrect -
Question 17 of 20
17. Question
2 point(s)For any two numbers SD is always
CorrectIncorrect -
Question 18 of 20
18. Question
2 point(s)Standard deviation of data is 12 and mean is 72 then coefficient of variation is
CorrectIncorrect -
Question 19 of 20
19. Question
2 point(s)The variance of 19, 21, 23, 25 and 27 is 8. The variance of 14, 16, 18, 20 & 22 is:
CorrectIncorrect -
Question 20 of 20
20. Question
2 point(s)Given the heights (in cm) of two groups of students:
Group A : 131 cm, 150 cm, 147 cm, 138 cm,144 cm
Group B : 139 cm, 148 cm, 132 cm, 151 cm, 140 cm
Which of the following is / are the true?I) The ranges of the heights of the two groups of students are the same.
II) The means of the heights of the two groups of students are the same.CorrectIncorrect