QNT 2020 MIDTERM REVIEW QUESTIONS
The Empirical Rule assumes a normal population, while Chebyshev applies to any
population. - Answers -
A frequency distribution - Answers - is a grouping of n data values into classes called
bins.
A frequency distribution usually has equal bin widths. - Answers - TRUE; Unequal bins
are possible, but rare
Symmetric - Answers - If the mean and median of a population are the same, then its
distribution is
Symmetric - Answers - Being equal or the same in size, shape, and relative position
In a left-skewed distribution - Answers - we expect that the median will be greater than
the mean.
In Right-Skewed distribution - Answers - we expect that the median will be less than the
mean.
Chebyshev's Theorem - Answers - A theorem that can be used to make statements
about the proportion of data values that must be within a specified number of standard
deviations of the mean; applies all samples
At least 75%.From 75% and 100 - Answers - Chebyshev's Theorem says that at most
______ percent of the data lie within 2 standard deviations of the mean.
population variance - Answers - equals the mean squared deviation; the average
squared distance from the mean
assess the shape of the distribution - Answers - Histograms are best used to
If population is higher the median - Answers - It is skewed to the right
Exponential Distribution - Answers - is used to describe data where lower values tend to
dominate and higher values don't occur very often.
uniform distribution - Answers - Distribution where populations are spaced
evenlyconsistent; unchanging; the same for everyone
Poisson Distribution - Answers - a discrete probability distribution describing the
likelihood of a particular number of independent events within a particular interval
The Empirical Rule assumes a normal population, while Chebyshev applies to any
population. - Answers -
A frequency distribution - Answers - is a grouping of n data values into classes called
bins.
A frequency distribution usually has equal bin widths. - Answers - TRUE; Unequal bins
are possible, but rare
Symmetric - Answers - If the mean and median of a population are the same, then its
distribution is
Symmetric - Answers - Being equal or the same in size, shape, and relative position
In a left-skewed distribution - Answers - we expect that the median will be greater than
the mean.
In Right-Skewed distribution - Answers - we expect that the median will be less than the
mean.
Chebyshev's Theorem - Answers - A theorem that can be used to make statements
about the proportion of data values that must be within a specified number of standard
deviations of the mean; applies all samples
At least 75%.From 75% and 100 - Answers - Chebyshev's Theorem says that at most
______ percent of the data lie within 2 standard deviations of the mean.
population variance - Answers - equals the mean squared deviation; the average
squared distance from the mean
assess the shape of the distribution - Answers - Histograms are best used to
If population is higher the median - Answers - It is skewed to the right
Exponential Distribution - Answers - is used to describe data where lower values tend to
dominate and higher values don't occur very often.
uniform distribution - Answers - Distribution where populations are spaced
evenlyconsistent; unchanging; the same for everyone
Poisson Distribution - Answers - a discrete probability distribution describing the
likelihood of a particular number of independent events within a particular interval
