STA270 Test 1 Questions and Correct Answers the Latest Update
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Course
STA 210
Institution
STA 210
Give the cases and the variable(s) in each situation below, and identify each
variable as categorical or quantitative:
a). Asking US citizens whether or not they support gun control.
Cases: US citizens
Variable: Support gun control? (yes/no) - categorical
1. Give the cases and the variable(...
(g) TRUE FALSE A biased sample is one that does not accurately reflect or
represent the population.
✓ True
(h) TRUE FALSE Bias can occur in a survey if the participants are all volunteers.
✓ True
(i) TRUE FALSE The symbol used for the population mean is - over x.
✓ False
(j) TRUE FALSE For symmetric, bell-shaped data, z-scores smaller than +2.00
would be unusual.
✓ False
4 . A survey results are displayed in the table below.
(Look in exam review)
In answering each of the questions below, round your answer to two decimal
places. (Show your work!)
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