Math 227 - Statistics » Winter 2021 » Quiz Sec 3.2

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Question #1
Given the following data 7 3 2 5 4 9 6 3 Find The range
A.   2
B.   7
C.   3
D.   4
Question #2
Given the following data 7 3 2 5 4 9 6 3 Find the sample standard deviation. Round the answer to one decimal place.
A.   4.2
B.   2.4
C.   2.2
D.   2.5
Question #3
Given the following data 7 3 2 5 4 9 6 3 Find the variance. Round the answer to one decimal place.
A.   5.7
B.   5.6
C.   6.2
D.   5.3
Question #4
A paint manufacturer discovers that the mean volume of paint in a gallon-sized pail is 1.1 gallons with a standard deviation of 0.1 gallons. The paint volumes are approximately bell-shaped. Estimate the percent of pails with volumes between 1.00 gallon and 1.20 gallons.
A.   68%
B.   32%
C.   95%
D.   Almost all (greater than 95%)

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