Ordinal Scale - answer-The ordinal scale of measurement categorizes and orders data with respect to some characteristic
Nominal Scale - answer-
Ratio Scale - answer-Ratio scales are the strongest level of measurement; they quantify differences in the size of data and have a true zero point as...
Ordinal Scale - answer-The ordinal scale of measurement categorizes and orders
data with respect to some characteristic
Nominal Scale - answer-
Ratio Scale - answer-Ratio scales are the strongest level of measurement; they
quantify differences in the size of data and have a true zero point as the origin.
Which measure of scale has a true zero point as the origin? - answer-Ratio Scale
A summary measure that is computed to describe a population characteristic from a
sample is called a - answer-statistic
A parameter is - answer-any descriptive measure of a population characteristic.
Which one of the following alternatives best describes the primary use of inferential
statistics? Inferential statistics are used to: - answer-make forecasts, estimates or
judgments about a large set of data based on statistical characteristics of a smaller
sample.
Descriptive statistics are used to: - answer-Descriptive statistics are used mainly to
summarize important characteristics of large data sets.
What is the main difference between descriptive statistics and inferential statistics?
- answer-Descriptive statistics are used to summarize a large data set while
inferential statistics involves procedures used to make forecasts or judgments about
a large data set by examining a smaller sample.
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The correlation coefficient is calculated by - answer-dividing the covariance of two
random variables by the product of their standard deviations.
Variance equals the - answer-sum of the squared deviations from the mean times
the probability that that each outcome will occur.
The coefficient of variation equals - answer-the standard deviation divided by the
mean.
Which of the following is an example of a parameter? - answer-A parameter is any
descriptive measure of a population characteristic. The population variance
describes a population so it is a parameter.
-the sample standard deviation and sample mean are each descriptive measures of
samples.
A summary measure of a characteristic of an entire population is called a: - answer-
Parameter
Data in a frequency distribution must - answer-belong to only one group or interval.
Intervals are mutually exclusive and non-overlapping.
A frequency distribution is a grouping of: - answer-data into intervals (classes) so
that the number of observations in each of the non-overlapping intervals (classes)
can be seen and tallied.
Frequency distribution - answer-A frequency distribution is a tabular presentation of
statistical data that aids the analysis of large data sets
The relative frequency is the percentage of total observations falling within each
interval. - answer-It is found by taking the frequency of the interval and dividing
that number by the sum of all frequencies.
The difference between the geometric mean and the arithmetic mean increases -
answer-with an increase in variability between period-to-period observations.
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