Ready to test your Knowledge?
Try out our new practice tests completely free!
exam preparation banner icon

Business Statistics

Statistics

Quiz 3 :

Descriptive Statistics

Quiz 3 :

Descriptive Statistics

search
arrow
It is inappropriate to use the mean to analyze data that are not at least interval level in measurement.
Free
True False
Answer:

Answer:

True

arrow
Average deviation is a common measure of the variability of data containing a set of numbers.
Free
True False
Answer:

Answer:

False

arrow
The most frequently occurring value in a set of data is called the mode.
Free
True False
Answer:

Answer:

True

arrow
If the mean of a distribution is greater than the median, then the distribution is positively skewed.
True False
Answer:
arrow
A histogram can be used in business analytics to determine if a variable is approximately normally distributed.
True False
Answer:
arrow
The sum of deviations about the arithmetic mean for a given set of data is always equal to zero.
True False
Answer:
arrow
An appropriate measure of central tendency for ordinal data is the mode.
True False
Answer:
arrow
The average of the squared deviations about the arithmetic mean is called the variance.
True False
Answer:
arrow
Statistical measures used to yield information about the center or the middle parts of a group of numbers are called the measures of central tendency.
True False
Answer:
arrow
A box and whisker plot is determined from the mean, the smallest and the largest values, and the lower and upper quartile.
True False
Answer:
arrow
The coefficient of variation is unitless.
True False
Answer:
arrow
The sample standard deviation is calculated by taking the square root of the population standard deviation.
True False
Answer:
arrow
If the median of a distribution is greater than mean, then the distribution is skewed to the left.
True False
Answer:
arrow
A nonzero value of the skewness indicates asymmetry of the distribution of the data.
True False
Answer:
arrow
The middle value in an ordered array of numbers is called the mode.
True False
Answer:
arrow
An outlier of a data set is determined from the lower and upper quartile
True False
Answer:
arrow
The lowest appropriate level of measurement for the median is ordinal.
True False
Answer:
arrow
If the mean, median, and mode are equal, then the distribution is positively skewed.
True False
Answer:
arrow
Skewness and kurtosis of a data set are measures of the shape of the distribution.
True False
Answer:
arrow
The most appropriate measure of central tendency for nominal-level data is the median.
True False
Answer:
Showing 1 - 20 of 88