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STA 2381 Patrick Statistics Test 1 Discussion Questions - with Correct Verified Answers
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STA 2381 Patrick Statistics Test 1 Discussion Questions - with Correct Verified Answers
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STA 2381 Patrick Statistics Test 1Discussion Questions - with Correct
Verified Answers
T/F: A bell curve is symmetric. - ANSWER true
Is IQR a measure of variability? - ANSWER Yes. IQR is the distance between the
lower & upper quartiles.
Which of the following is NOT a symbol used to represent the "mean"?
a) X-bar
b) Eta
c) Mu
d) A&C - ANSWER B. Eta, which is used to denote the median of a population
Which set of fences appear on the boxplot?
a) inner fences
b) outer fences
, c) both inner and outer fences
d) neither inner or outer fences - ANSWER D. neither inner or outer fences
appear on the box plot. They are only used to help construct the plot but are not
seen on the box plot.
Which of the following is not true of Chebychev's rule?
a. it can be used for any number k greater than 0
b. it can be applied to any data set
c. it tells us how many measurements fall within k standard deviations of the
mean
d. all of the above are true of Chebyshev's rule - ANSWER A. is not true; it can
be used for any number k greater than 1
Sally plans to visit Europe this summer. She heard from a friend that a shirt she
wanted costed 50 euros in Europe. The same shirt from a different store in
America costed 55 American dollars. Which of the following would be the most
useful for Sally to see whether buying the shirt in America or Europe would be
cheaper?
A. A box plot
B. Stem-and-leaf plot
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