Unit 4: Data and Analysis MCQs

Question 1

A taxi charges Rs 150 plus Rs 40 per km. The intercept of this linear model is:

Accepted Answer

150

Answer

40

Answer

190

Answer

110

Question 2

Which chart shows parts of a whole as percentages?

Accepted Answer

Pie chart

Answer

Box plot

Answer

Line graph

Answer

Scatter plot

Question 3

Which chart is best for showing a trend over time?

Accepted Answer

Line graph

Answer

Histogram

Answer

Box plot

Answer

Pie chart

Question 4

The 3-point moving averages of 45, 52, 61, 58, 70 are:

Accepted Answer

[52.67, 57.0, 63.0]

Answer

[57.2]

Answer

[45, 52, 61]

Answer

[52.0, 57.0, 63.0]

Question 5

Predicting a value far outside the range of the collected data is called:

Accepted Answer

extrapolation

Answer

interpolation

Answer

clustering

Answer

smoothing

Question 6

Surveying only your friends about the college canteen gives:

Accepted Answer

a biased sample

Answer

a random sample

Answer

a parameter

Answer

a census

Question 7

Removing duplicate records and fixing spellings like "Lhr" and "Lahore" is called data:

Accepted Answer

cleaning

Answer

visualisation

Answer

sampling

Answer

encryption

Question 8

The interquartile range is:

Accepted Answer

Q3 − Q1

Answer

max − min

Answer

mean − median

Answer

Q2 − Q1

Question 9

The relationship between height and weight of 50 students is best shown by a:

Accepted Answer

scatter plot

Answer

pie chart

Answer

line graph

Answer

bar chart

Question 10

The range of Pearson's correlation coefficient r is:

Accepted Answer

−1 to +1

Answer

0 to 1

Answer

−100 to +100

Answer

0 to infinity

Question 11

The whole group about which we want information is the:

Accepted Answer

population

Answer

sample

Answer

statistic

Answer

parameter

Question 12

The median of 4, 7, 7, 8, 9, 10, 25 is:

Accepted Answer

8

Answer

9

Answer

7

Answer

10

Question 13

Which Excel function returns the slope of the regression line?

Accepted Answer

=SLOPE()

Answer

=AVERAGE()

Answer

=CORREL()

Answer

=TRENDM()

Question 14

The symbol μ usually represents the:

Accepted Answer

population mean (a parameter)

Answer

correlation

Answer

sample size

Answer

sample mean

Question 15

With Q1 = 55 and Q3 = 70, which value is an outlier?

Accepted Answer

95

Answer

72

Answer

90

Answer

45

Question 16

In an experiment, the group that does not receive the new treatment is the:

Accepted Answer

control group

Answer

treatment group

Answer

sample group

Answer

outlier group

Question 17

For salaries with a few very high values, the best measure of centre is the:

Accepted Answer

median

Answer

mode

Answer

range

Answer

mean

Question 18

Which chart is used for the distribution of continuous data in ranges?

Accepted Answer

Histogram

Answer

Line graph

Answer

Pie chart

Answer

Bar chart

Question 19

Which method can establish cause and effect?

Accepted Answer

Randomised controlled experiment

Answer

Observational study

Answer

Survey

Answer

Census

Question 20

A correlation coefficient of −0.92 shows:

Accepted Answer

strong negative correlation

Answer

causation

Answer

weak positive correlation

Answer

no correlation

Question 21

A number that describes a sample is a:

Accepted Answer

statistic

Answer

population

Answer

parameter

Answer

census

Question 22

Replacing each value by the average of it and its neighbours to reveal a trend is called:

Accepted Answer

smoothing (moving average)

Answer

sorting

Answer

hashing

Answer

clustering

Question 23

The mode of A, B, A, C, B, A, D is:

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 24

K-means clustering is an example of:

Accepted Answer

unsupervised learning

Answer

supervised learning

Answer

encryption

Answer

linear regression

Question 25

In K-means, after assigning points to clusters, each centroid moves to the:

Accepted Answer

mean of the points in its cluster

Answer

median of all data

Answer

farthest point

Answer

origin (0, 0)

Unit 4: Data and Analysis MCQs — Computer Science (page 2)

26. A taxi charges Rs 150 plus Rs 40 per km. The intercept of this linear model is:

27. Which chart shows parts of a whole as percentages?

28. Which chart is best for showing a trend over time?

29. The 3-point moving averages of 45, 52, 61, 58, 70 are:

30. Predicting a value far outside the range of the collected data is called:

31. Surveying only your friends about the college canteen gives:

32. Removing duplicate records and fixing spellings like "Lhr" and "Lahore" is called data:

33. The interquartile range is:

34. The relationship between height and weight of 50 students is best shown by a:

35. The range of Pearson's correlation coefficient r is:

36. The whole group about which we want information is the:

37. The median of 4, 7, 7, 8, 9, 10, 25 is:

38. Which Excel function returns the slope of the regression line?

39. The symbol μ usually represents the:

40. With Q1 = 55 and Q3 = 70, which value is an outlier?

41. In an experiment, the group that does not receive the new treatment is the:

42. For salaries with a few very high values, the best measure of centre is the:

43. Which chart is used for the distribution of continuous data in ranges?

44. Which method can establish cause and effect?

45. A correlation coefficient of −0.92 shows:

46. A number that describes a sample is a:

47. Replacing each value by the average of it and its neighbours to reveal a trend is called:

48. The mode of A, B, A, C, B, A, D is:

49. K-means clustering is an example of:

50. In K-means, after assigning points to clusters, each centroid moves to the:

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