Author Question: Paying for purchases One day a store tracked the way shoppers paid for their purchases. Their data ... (Read 98 times)

kaid0807 · **on:** Jul 25, 2018

Paying for purchases One day a store tracked the way shoppers paid for their purchases. Their data are summarized in the table.

Cash Check Charge Total
Male 18 10 12 40
Female 18 12 30 60
Total 36 22 42 100
a. What percent of men paid cash?
b. What is the conditional relative frequency distribution of payment method for women?
c. If you wanted to show the association between gender and method of payment visually, what kind of graph would you make? (Just name it.)
d. Is there evidence of an association between gender and method of payment? Explain briefly.

Question 2

Environmental researchers have collected rain acidity data for several decades. They want to see if there is any evidence that attempts to reduce industrial pollution have produced a trend toward less acidic rainfall.

They should display their data in a(n)
A) bar graph
B) contingency table
C) histogram
D) timeplot
E) boxplot

aburgess · **Reply #1 on:** Jul 25, 2018

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