Computer Oriented Statistical Techniques MCQs - 2 | 100+ MCQ Questions with Answers

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26) The arithmetic mean of the numbers 8, 3, 5, 12, and 10 is ________

a) 6.7
b) 7.6
c) 8.4
d) 4.8

Ans: b

27) The algebraic sum of the deviations of a set of numbers from their arithmetic mean is _____

a) always negative
b) one
c) zero
d) always positive

Ans: c

28) The set of numbers 3, 4, 4, 5, 6, 8, 8, 8, and 10 has median ________

a) 6
b) 8
c) 10
d) 4

Ans: a

29) The set of numbers 5, 5, 7, 9, 11, 12, 15, and 18 has median _______

a) 9
b) 10
c) 11
d) 12

Ans: b

30) The set 2, 2, 5, 7, 9, 9, 9, 10, 10, 11, 12, and 18 has mode ______

a) 10
b) 11
c) 2
d) 9

Ans: d

31) The set 3, 5, 8, 10, 12, 15, and 16 has __________

a) 10
b) 8
c) 12
d) No Mode

Ans: d

32) The mode of a set of numbers is that value which occurs with the greatest frequency; that is, it is the ___________

a) Least Common Value
b) Most Common Value
c) Total of all Value
d) Average of All value

Ans: b

33) The ____________ of a set of numbers arranged in order of magnitude (i.e., in an array) is either the middle value or the arithmetic mean of the two middle values.

a) Mean
b) Median
c) Mode
d) Variance

Ans: b

34) The set 2, 3, 4, 4, 4, 5, 5, 7, 7, 7, and 9 has two modes, 4 and 7, and is called _____________

a) Bimodal
b) Trimodal
c) unimodal
d) equimodal

Ans: a

35) Mean – Mode = 3 (Mean - _______ )

a) Variance
b) Standard Deviation
c) Mean Deviation
d) Median

Ans: d

36) The geometric mean of the numbers 2, 4, and 8 is _________

a) 2
b) 4
c) 8
d) 64

Ans: b

37) The harmonic mean of the numbers 2, 4, and 8 is _________

a) 3.43
b) 4
c) 8
d) 7

Ans: a

38) In a company having 80 employees, 60 earn $10.00 per hour and 20 earn $13.00 per hour. Determine the mean earnings per hour.

a) 11.5
b) 12.35
c) 10.75
d) 15

Ans: c

39) Four groups of students, consisting of 15, 20, 10, and 18 individuals, reported mean weights of 162, 148, 153, and 140 pounds (lb), respectively. Find the mean weight of all the students.

a) 180
b) 170
c) 160
d) 150

Ans: d

40) During one year the ratio of milk prices per quart to bread prices per loaf was 3.00, whereas during the next year the ratio was 2.00. Find the arithmetic mean of the ratios of bread prices to milk prices for the 2-year period.

a) 0.417
b) 2.5
c) 1.5
d) 3.45

Ans: a

41) A car travels 25 miles at 25 miles per hour (mi/h), 25 miles at 50 mph, and 25 miles at 75 mph. Find the harmonic mean of the three velocities.