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WorksheetsBRM Review Quiz
Total questions: 10
Worksheet time: 5mins
Fewer groups provide a "coarser" histogram.
True
False
True on days with a T in them.
According to statistical notations, what do lower case letters stand for?
population measures
sample measures
act as a summation operator
represent the number of items in a population
Using Chebyshev's theorem for standard deviation, calculate the percentage of data that lie within three standard deviations of the mean.
98%
89%
65%
43%
Calculate the coefficient of variation from the following data:
z-score = 1.32; standard deviation =2; mean = 6; total variation = 0.6
.33
27.16
.5
3
If a histogram tails off to the right
The data is positively skewed
The data is negatively skewed
The distribution has fat tails
Dr. Barnhart has made another mistake
is
A medical mystery
The symmetry of a data set
The peakedness or flatness of a histogram
The degree of association in the data
When a linear relationship exists for one variable that increases while the other decreases, there is
Correlaton above 1
zero correlation
positive correlation
negative correlation
When comparing the variance for t-distribution to that of the standard normal distribution,
t-distribution has a larger variance
standard normal distribution has a larger variance
When is a t-distribution used instead of a normal distribution?
When Dr. Barnhart says to
When the population standard deviation is known
When the population standard deviation is unknown
When the population mean is known
How do you calculate the standard error?
Divide the variance by the square root of the mean
Divide the standard deviation by the square root of the mean
Divide the variance by the square root of the number of items in the sample
Divide the standard deviation by the square root of the number of items in the sample
