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Statistics

Quiz by Umm-e-Hani

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10 questions
Show answers
  • Q1
    In a normal distribution, approximately what percentage of data falls within one standard deviation of the mean?
    50%
    75%
    95%
    68%
    30s
  • Q2
    What is the mean of the following data set: 5, 10, 15, 20, 25?
    10
    20
    15
    12
    30s
  • Q3
    If two events A and B are independent, what is the probability of both A and B occurring?
    P(A \cup B) = P(A) + P(B)
    P(A \cap B) = P(A) \times P(B)
    P(A \cap B) = \frac{P(A) + P(B)}{2}
    P(A \cap B) = P(A/B) \times P(B)
    30s
  • Q4
    Which measure of central tendency is most affected by extreme values?
    Mean
    Median
    Mode
    Range
    30s
  • Q5
    What is the purpose of a scatter plot in statistics?
    To summarize statistical data in a table.
    To represent data over time.
    To display frequencies of categories.
    To show the relationship between two quantitative variables.
    30s
  • Q6
    In linear regression, what does the slope of the line represent?
    The intercept of the regression line.
    The average value of the dependent variable.
    The change in the dependent variable for a one-unit change in the independent variable.
    The correlation coefficient between two variables.
    30s
  • Q7
    In statistics, what does a standard deviation measure?
    The amount of variation or dispersion in a set of values.
    The central value of a data set.
    The average of the squared differences from the mean.
    The total sum of all values in a data set.
    30s
  • Q8
    What is an outlier in a data set?
    A measure of the central tendency of the data set.
    The most frequently occurring data point in the set.
    A point that lies within one standard deviation of the mean.
    A data point that significantly differs from other observations.
    30s
  • Q9
    What is the purpose of using a normal distribution in statistics?
    To model many natural phenomena and inferences about a population.
    To summarize data with a single number.
    To represent categorical data only.
    To create a visual display of data.
    30s
  • Q10
    What is the mean of the following data set: 2, 4, 6, 8?
    5
    4
    6
    7
    30s

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