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WorksheetsSTAT 210 Test 2
Total questions: 18
Worksheet time: 14mins
What symbol is used to denote the sample mean?
x
μ
η
M
What symbol is used to denote the sample standard deviation?
s
σ
σ2
s2
The formula 2n+1 helps us find what information?
median location
the median
the mean
the sample size
Which measure of spread is resistant to outliers?
IQR
standard deviation
variance
range
Which of the following is NOT required to fully describe a distribution?
center
spread
number of data points
unusual features
shape
What is wrong with this stem and leaf plot?
nothing
rule is not stated
number of stems
order
How many stems should a stem-and-leaf plot have?
between 2-5
between 15-25
between 6-20
between 10-15
Which of the following is characteristic of a long-tailed distribution
symmetric with no outliers
outliers only on the left end
outliers only on the right end
symmetric with outliers on both ends
Which measure of center should be used when describing this graph?
median
mean
standard deviation
IQR
Mean is to ___, as median is to ___.
standard deviation; IRQ
IQR; standard deviation
resistant to outliers; not resistant to outliers
center; spread
Describe the shape of the graph.
Bimodal
Normal
Heavily left skewed
Heavily right skewed
On a box plot, adjacent values are...
the smallest and biggest value in the data set that are not outliers
the minimum and maximum values of the data set
Q1 and Q3
whatever you want
Which of the following is NOT used to display quantitative data?
stem-and-leaf plot
box plot
histogram
bar graph
Which measures of center and spread are best to use when describing this graph?
median
mean
IQR
standard deviation
What statistic is used to determine if there are outliers?
IQR
standard deviation
range
mean
Which measure of spread should be used to describe the distribution?
standard deviation
interquartile range
range
median
