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1

What is the primary purpose of business statistics?

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Answer - a) To make business decisions

2

Which of the following is a qualitative variable?

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3

What is the range of a dataset?

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Answer - b) The difference between the largest and smallest data values

4

Which measure of central tendency is most affected by outliers?

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5

In a frequency distribution, what is a class interval?

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Answer - b) A category that groups data into a specified range

6

Which of the following is a measure of dispersion?

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7

The coefficient of variation is a measure of:

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Answer - b) Variability relative to the mean

8

What is the formula for calculating the variance of a dataset?

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Answer - c) (Sum of squared deviations) / (Sample size - 1)

9

Which type of data is represented by a bar chart?

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Answer - b) Qualitative data

10

The normal distribution is also known as:

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Answer - a) The bell curve

11

In hypothesis testing, what is the significance level typically denoted as?

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12

Which statistical test is used to determine if there is a significant difference between the means of two independent groups?

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13

A confidence interval is a range of values that:

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Answer - b) Contains the population mean with a certain level of confidence

14

Which of the following is NOT a measure of association or correlation?

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15

Which type of sampling technique involves selecting every nth item from a list?

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Answer - c) Systematic sampling

16

In statistical terms, what does population refer to?

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Answer - b) The entire group being studied

17

What does the term skewness in statistics refer to?

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Answer - b) The symmetry of a distribution

18

Which measure of dispersion is less affected by outliers compared to the range?

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Answer - c) Interquartile range (IQR)

19

A histogram is used to visualize the:

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Answer - a) Frequency distribution of a dataset

20

Which type of data has a natural order or ranking, but the differences between values are not meaningful?

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Answer - c) Interval data

21

Which statistical test is used to analyze the relationship between two categorical variables?

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Answer - a) Chi-squared test

22

What is the formula for calculating the mean of a dataset?

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Answer - a) (Sum of all data values) / (Sample size)

23

In probability theory, what does complementary events mean?

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Answer - b) Events that cannot occur together

24

What is the mode of a dataset?

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Answer - a) The most common value in the dataset

25

What does the term p-value represent in hypothesis testing?

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Answer - a) The probability of making a Type I error

26

Which type of sampling technique divides the population into subgroups and then samples from each subgroup?

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Answer - b) Stratified sampling

27

The interquartile range (IQR) represents the range between the:

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Answer - b) First quartile (Q1) and third quartile (Q3)

28

Which of the following probability distributions is discrete?

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Answer - b) Poisson distribution

29

Which measure of central tendency is used for skewed data?

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30

A scatterplot is used to visualize the relationship between:

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Answer - c) Two continuous variables

31

What is the formula for calculating the standard deviation of a dataset?

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Answer - a) Square root of the variance

32

Which of the following is NOT a measure of central tendency?

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33

In a normal distribution, what percentage of data falls within one standard deviation of the mean?

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34

Which statistical test is used to determine if there is a significant difference between the means of more than two groups?

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35

What does the term correlation measure in statistics?

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Answer - b) Relationship between two variables

36

What is the primary purpose of a box plot (box-and-whisker plot)?

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Answer - c) To visualize the distribution of data and identify outliers

37

Which type of data has a natural order or ranking, and the differences between values are meaningful?

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38

What does the term confidence level represent in a confidence interval?

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Answer - d) The level of confidence in the interval containing the population parameter

39

Which statistical test is used to analyze the relationship between a dependent variable and multiple independent variables?

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Answer - d) Regression analysis

40

What is the formula for calculating the mode of a dataset?

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Answer - No specific formula for mode calculation.

41

Which type of sampling technique involves selecting the most convenient sample elements?

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Answer - d) Convenience sampling

42

Which of the following probability distributions has a symmetric, bell-shaped curve?

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Answer - d) Normal distribution

43

In hypothesis testing, what is a Type II error?

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Answer - b) Failing to reject a false null hypothesis

44

Which measure of dispersion is robust to outliers?

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Answer - c) Interquartile range (IQR)

45

What is the probability of an event that is certain to occur?

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46

Which type of data consists of categories with no natural order?

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47

What does the term null hypothesis represent in hypothesis testing?

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Answer - c) The hypothesis that is being tested

48

Which of the following is a measure of relative standing in a dataset?

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49

What is the primary use of a pie chart?

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Answer - c) To compare parts of a whole

50

What is the formula for calculating the coefficient of variation (CV)?

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Answer - a) (Standard deviation) / (Mean)

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