Statistics Questions with CORRECT Answers (Verified Update)
Q1: Suppose 48.2% of all students on your campus own a car.
Answer: This value represents a parameter because it is a numerical summary of a population.
Q2: Suppose a sample of 100 students is obtained, and from this sample we find that 46% own a
car.
Answer: This value represents a statistic because it is a numerical summary of a sample
Q3: side-by-side bar graph
Answer: to compare the data for the two different years right next to eachother
Q4: Horizontal bars are used when
Answer: category names are lengthy
Q5: Guidelines for constructing good graphics
Answer: Title must be clear, avoid white space but dont clutter, avoid three dimensions, dont use
more than one design in the same graphic
Q6: Finding the median with even numbers
Answer: add up the 2 middle numbers then divide by 2
Q7: If the graph is skewed left the...
Answer: Mean is less than the Median
Q8: If the graph is skewed right the ...
Answer: the mean is greater than the median
Q9: if the graph is symmetric the...
Answer: the mean is equal to the medium
Q10: the larger the standard deviation
Answer: the greater the dispersion
Q11: how to find the range with the percentage
Answer: for the low: 100- NOSD (SD) high: 100 - NOSD (SD)
, Q12: A confounding variable
Answer: is an explanatory variable that was considered in a study but whose effect cannot be
distinguished from a second explanatory variable in the study.
Q13: bell-shaped distribution
Answer: the highest frequency occurs in the middle and frequencies tail off to the left and right of
the middle. That is, the graph looks like the profile of a bell
Q14: bimodal
Answer: A data set can have two modes
Q15: Chebyshev's Inequality
Answer: in non normal data it determines the percentage of the population within the standard
deviation given (1-(1)/k^2)
Q16: class midpoint
Answer: the sum of consecutive lower class limits divided by 2
Q17: Class width
Answer: is the difference between consecutive lower class limits.
Q18: Class width equation
Answer: (largest value - smallest value) / number of classes
Q19: cluster sample
Answer: is obtained by selecting all individuals within a randomly selected collection or group of
individuals.
Q20: continuous variable
Answer: variable that has an infinite number of possible values
Q21: descriptive statistics
Answer: consist of organizing and summarizing data. Descriptive statistics describe data through
numerical summaries, tables, and graphs.
Q1: Suppose 48.2% of all students on your campus own a car.
Answer: This value represents a parameter because it is a numerical summary of a population.
Q2: Suppose a sample of 100 students is obtained, and from this sample we find that 46% own a
car.
Answer: This value represents a statistic because it is a numerical summary of a sample
Q3: side-by-side bar graph
Answer: to compare the data for the two different years right next to eachother
Q4: Horizontal bars are used when
Answer: category names are lengthy
Q5: Guidelines for constructing good graphics
Answer: Title must be clear, avoid white space but dont clutter, avoid three dimensions, dont use
more than one design in the same graphic
Q6: Finding the median with even numbers
Answer: add up the 2 middle numbers then divide by 2
Q7: If the graph is skewed left the...
Answer: Mean is less than the Median
Q8: If the graph is skewed right the ...
Answer: the mean is greater than the median
Q9: if the graph is symmetric the...
Answer: the mean is equal to the medium
Q10: the larger the standard deviation
Answer: the greater the dispersion
Q11: how to find the range with the percentage
Answer: for the low: 100- NOSD (SD) high: 100 - NOSD (SD)
, Q12: A confounding variable
Answer: is an explanatory variable that was considered in a study but whose effect cannot be
distinguished from a second explanatory variable in the study.
Q13: bell-shaped distribution
Answer: the highest frequency occurs in the middle and frequencies tail off to the left and right of
the middle. That is, the graph looks like the profile of a bell
Q14: bimodal
Answer: A data set can have two modes
Q15: Chebyshev's Inequality
Answer: in non normal data it determines the percentage of the population within the standard
deviation given (1-(1)/k^2)
Q16: class midpoint
Answer: the sum of consecutive lower class limits divided by 2
Q17: Class width
Answer: is the difference between consecutive lower class limits.
Q18: Class width equation
Answer: (largest value - smallest value) / number of classes
Q19: cluster sample
Answer: is obtained by selecting all individuals within a randomly selected collection or group of
individuals.
Q20: continuous variable
Answer: variable that has an infinite number of possible values
Q21: descriptive statistics
Answer: consist of organizing and summarizing data. Descriptive statistics describe data through
numerical summaries, tables, and graphs.
