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MBA - First Semester > CAQs For QT&A > Flashcards

CAQs For QT&A Flashcards

1
Q

From which measure of central tendency is the sum of the deviations (ignoring signs) minimum?

A

Median

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2
Q

What do you call the two events which can not occur simultaneously?

A

Mutually exclusive

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3
Q

Which of the following would fit the definition of “statistical independence” of events A and B?

A

P(A/B) = P(A)

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4
Q

What do you call the data collected first hand by the researcher as?

A

Primary

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5
Q

A sociologist focusing on popular culture and media believes that the average number of hours per week (hrs/week) spent using social media is greater for women than for men. Examining two independent simple random samples of 100 individuals each, the researcher calculates sample standard deviations of 2.3 hrs/week and 2.5 hrs/week for women and men respectively. If the average number of hrs/week spent using social media for the sample of women is 1 hour greater than that for the sample of men, what conclusion can be made from a hypothesis test where: { 0: − = 0 1: − > 0?

A

The observed difference in average number of hrs/week spent using social media is significant

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6
Q

What do you refer the approach of drawing conclusions about the population from few units out of full population as?

A

Sampling

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7
Q

Which of the following statements is true about the type one error?

A

Type one error means to reject a correct hypothesis

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8
Q

What is plotted on Y axis when we draw an ogive?

A

Cumulative frequency

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9
Q

What is the parameter of chi-square distribution?

A

Degrees of freedom

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10
Q

Which of the following statements is true about the null hypothesis?

A

Any wrong decision related to the null hypothesis results in two types of errors

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11
Q

What would be the value of Y if X is 20 and regression equation of Y on X is: Y = 5 + 0.5X?

A

15

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12
Q

What is the degree of freedom for a 3 X 3 contingency table?

A

4

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13
Q

What does the probability of all the events in a sample space add up to?

A

100%

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14
Q

What do you call the statement that is accepted if the sample data provide sufficient evidence that the null hypothesis is false?

A

Alternate hypothesis

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15
Q

What do you call a characteristic that varies in quality from one individual to another?

A

Attribute

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16
Q

What type of correlation exists between the two variables, if the values of the two variables move in opposite direction?

A

Negative

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17
Q

What is the mode of the following data of marks obtained by 10 students in a class test? 2,8,10,15,12,2,10,2,8,2

A

2

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18
Q

What is the standard deviation of the following distribution of daily wages earned by a worker in 6 days of a week? 200, 200, 200, 200, 200, 200

A

0

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19
Q

What is the formula for coefficient of average deviation from median?

A

A.D./Median

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20
Q

Which of the following statements is true about the geometric mean of two regression coefficients?

A

It is equal to the correlation coefficient

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21
Q

Which of the following best describes the general probability rule?

A

P(A or B) = P(A) + P(B) - P(A and B)

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22
Q

What is the original hypothesis known as?

A

Null hypothesis

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23
Q

In a college 50% of the students play cricket, 40% play badminton and 20% play both the sports. If a student is selected at random, what is the probability that he/she plays either cricket or badminton or both?

A

0.7

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24
Q

If the ratio of change between the two variables is a constant then what type of correlation will be there?

A

Linear

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25
Q

What do you name the test as, if the critical region is located equally in both sides of the sampling distribution of test-statistic?

A

Two tailed

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26
Q

Which of following does analysis of variance compare for several populations?

A

Mean

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27
Q

Which of the following techniques is an analysis of the relationship between two variables to help provide the prediction mechanism?

A

Regression

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28
Q

What is the mean of the following sales data? 10,10,10,-10,-10,-10

A

0

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29
Q

What is the median of the following data of age of 5 children in a study: 4,2,8,10,6?

A

6

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30
Q

What would be the value of X if Y is 20 and regression equation of Y on X is: Y = 5 + 0.5X?

A

Can not predict X from this regression equation

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31
Q

“A failing student is passed by an examiner”, is an example of which of the following?”

A

Type two error

32
Q

An advertising agency wants to test the hypothesis that the proportion of adults in India who read a Sunday Magazine is 25 percent. What would be the null hypothesis about the proportion reading the Sunday Magazine?

A

Ho = 25%

33
Q

If r = 0.4 and one of the regression coefficients is 0.2, what is the vale of the other regression coefficient?

A

0.8

34
Q

What is the purpose of goodness of fit test?

A

“To assess whether the central tendency, variability and distribution of sample is different from that of the population “

35
Q

On which of the following does the critical value for a chi-square statistic rely?

A

The degrees of freedom

36
Q

Which average is the best to use for averaging Speed?

A

Harmonic mean

37
Q

What would be the value of correlation coefficient(r) if there is a perfect positive correlation between the two variables?

A

r = +1

38
Q

What is the conditional probability of event A given event B has occurred?

A

P(A/B) = P(A∩B)/P(B)

39
Q

What do you call events A and B if the outcome of event A is not affected by event B?

A

Independent

40
Q

Chi-square test for independence assesses which of the following?

A

It assesses whether there is a relationship between two categorical variables

41
Q

What is the coefficient of quartile deviation if Q1 is 15 and Q3 is 45?

A

0.5

42
Q

What is the coefficient of variation if variance is 16 and mean is 80?

A

5%

43
Q

Which measure of variation cannot be computed for an open-ended distribution?

A

Range

44
Q

Which scale represents the highest level of measurement?

A

Ratio

45
Q

What category out of the following best fits the Bar diagram?

A

One dimensional

46
Q

In which dispersion we ignore Algebraic signs?

A

M.D

47
Q

Which is suitable when we measure average population growth in India?

A

G.M

48
Q

Which dispersion is also called as Inter Quartile range?

A

Quartile deviation

49
Q

When is direct personal investigation method is suitable?

A

Information is very confidential and complex

50
Q

What do we use for representing pictograms?

A

Pictures

51
Q

In Pie chart the components of a factor is represented by what?

A

Sectors

52
Q

What is the geometric mean of 4&5?

A

4.472

53
Q

With the help of ogive curves which central Tendency can be identified?

A

Median

54
Q

Which dispersion we use in day to day life?

A

Range

55
Q

When scope of enquiry is limited and the universe containing a unit having different characteristics make the Intensive study of each unit desirable. which method is more suitable?

A

Census

56
Q

If Q1=36, Q3=72 what is the quartile deviation?

A

18

57
Q

Which is the best measure of relative measures of dispersion?

A

Coefficient of variation

58
Q

What is the standard deviation of the following age distribution? 10,10,10,10,10

A

0

59
Q

If there are two groups with 75 and 65 as Arithmetic means and containing 15 and 13 observations, then what is the combined arithmetic mean?

A

70.35

60
Q

Which is not a measure of Central Tendency?

A

Range

61
Q

Which central tendency can be identified with the help of Histogram?

A

Mode

62
Q

Which of the drawbacks of the Direct Personal Investigation method?

A

It is very costly and time taking process

63
Q

What is the coefficient of variation if S.D=3 and mean =12 ?

A

25

64
Q

The values changing at a percentage rate have to be found, then which is most suitable average?

A

Geometric mean

65
Q

What is the mean of 5,5,5,5,5,5 ?

A

5

66
Q

The reciprocal of arithmetic mean of the reciprocal of observations is known as which central tendency?

A

Harmonic mean

67
Q

What is the value of the sum of the deviations taken from mean value?

A

0

68
Q

Which is true interms of pictograms?

A

Least accurate

69
Q

Which of the following is the difference between primary and secondary data?

A

Primary data is more reliable than secondary data

70
Q

What is the range for the following distribution? 5,5,5,5,5,5,5,5,5,5

A

0

71
Q

In quartile deviation we devide the data into how many equal parts?

A

4

72
Q

Which of the following is not the source of government publications?

A

Finance commission report

73
Q

What is the range of the following sales data? 10,12,14,16,18,20 ?

A

10

74
Q

Which of the following is True related to Histogram?

A

Class intervals are equal

75
Q

What is the suitable average when data is having extreme values?

A

Median

MBA - First Semester (17 decks)

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