WPC 300 FINAL CERTIFICATION
EVALUATION TESTED QUESTIONS AND
ANSWERS COMPLETE REVIEW
●● Which of the following describes a positively skewed histogram?
-a histogram with large kurtosis
-a histogram for which mean and mode values are the same.
-a histogram that tails off towards the right
-a histogram that has no fluctuation in mass
Answer: -a histogram that tails off towards the right
●● Which of the following describes the standard deviation?
-It is the average of the greatest and least values in the data set.
-It is the square of variance
-It is the difference between the first and third quartiles of a data set.
-It is the square root of the variance.
Answer: It is the square root of the variance.
●● What are the three principles of describing data?
-Mean, median and mode
-Dispersion, range and standard deviation
,-Centrality, dispersion and size
-Center, spread and shape
Answer: Center, spread and shape
●● The ________ is the observation that occurs most frequently.
-mode
-mean
-outlier
-median
Answer: mode
●● When two variables are highly positively correlated, the correlation
coefficient will be _______.
-close to 1
-close to -1
-close to 10
-close to 0
Answer: close to 1
●● Standard deviation of a normal data distribution is a _______.
-measure of data shape
-measure of data dispersion
,-measure of data quality
-measure of data centrality
Answer: measure of data dispersion
●● Which of the following is an example of a sample?
-The population of Canada
-The number of members in the Democratic party
-The number of individuals who have a Ford car
-The number of IT employees out of all employees working in an office
of Google
Answer: The number of IT employees out of all employees working in
an office of Google
●● Which of the following is true for a median?
-A median is only meaningful for interval or ordinal data and not for
ratio data
-For an even number of observations, the median is the mean of the two
middle numbers
-Median can be calculated no matter how the data is arranged
-Medians are affected by outliers
Answer: For an even number of observations, the median is the mean of
the two middle numbers
, ●● Which of the following is a Type-I error?
-The null hypothesis is actually true, but the hypothesis test incorrectly
rejects it.
-The null hypothesis is actually true, and the hypothesis test correctly
fails to reject it.
-The null hypothesis is actually false, but the test incorrectly fails to
reject it.
-The null hypothesis is actually false, and the test correctly rejects it.
Answer: The null hypothesis is actually true, but the hypothesis test
incorrectly rejects it.
●● Which of the following proposition describes an existing theory or
belief?
-Null hypothesis
-Alternative hypothesis
-Proportion
-Standard deviation
Answer: Null hypothesis
●● You are collecting data via an online survey to improve education
standards at ASU. Which of the following methods will not result in data
collection bias?
-Some individuals are less likely to participate because they have strong
opinions against ASU education standards.
EVALUATION TESTED QUESTIONS AND
ANSWERS COMPLETE REVIEW
●● Which of the following describes a positively skewed histogram?
-a histogram with large kurtosis
-a histogram for which mean and mode values are the same.
-a histogram that tails off towards the right
-a histogram that has no fluctuation in mass
Answer: -a histogram that tails off towards the right
●● Which of the following describes the standard deviation?
-It is the average of the greatest and least values in the data set.
-It is the square of variance
-It is the difference between the first and third quartiles of a data set.
-It is the square root of the variance.
Answer: It is the square root of the variance.
●● What are the three principles of describing data?
-Mean, median and mode
-Dispersion, range and standard deviation
,-Centrality, dispersion and size
-Center, spread and shape
Answer: Center, spread and shape
●● The ________ is the observation that occurs most frequently.
-mode
-mean
-outlier
-median
Answer: mode
●● When two variables are highly positively correlated, the correlation
coefficient will be _______.
-close to 1
-close to -1
-close to 10
-close to 0
Answer: close to 1
●● Standard deviation of a normal data distribution is a _______.
-measure of data shape
-measure of data dispersion
,-measure of data quality
-measure of data centrality
Answer: measure of data dispersion
●● Which of the following is an example of a sample?
-The population of Canada
-The number of members in the Democratic party
-The number of individuals who have a Ford car
-The number of IT employees out of all employees working in an office
of Google
Answer: The number of IT employees out of all employees working in
an office of Google
●● Which of the following is true for a median?
-A median is only meaningful for interval or ordinal data and not for
ratio data
-For an even number of observations, the median is the mean of the two
middle numbers
-Median can be calculated no matter how the data is arranged
-Medians are affected by outliers
Answer: For an even number of observations, the median is the mean of
the two middle numbers
, ●● Which of the following is a Type-I error?
-The null hypothesis is actually true, but the hypothesis test incorrectly
rejects it.
-The null hypothesis is actually true, and the hypothesis test correctly
fails to reject it.
-The null hypothesis is actually false, but the test incorrectly fails to
reject it.
-The null hypothesis is actually false, and the test correctly rejects it.
Answer: The null hypothesis is actually true, but the hypothesis test
incorrectly rejects it.
●● Which of the following proposition describes an existing theory or
belief?
-Null hypothesis
-Alternative hypothesis
-Proportion
-Standard deviation
Answer: Null hypothesis
●● You are collecting data via an online survey to improve education
standards at ASU. Which of the following methods will not result in data
collection bias?
-Some individuals are less likely to participate because they have strong
opinions against ASU education standards.
