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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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