Raj thinks people are more polite on sunny days than on rainy days, so he begins collecting data by categorizing people into “polite” or “impolite,” and he counts them under “sunny” and “not sunny” conditions. Previous research suggests that 80% of people are happy on sunny days. Based on this information, what should Raj’s expected frequency for polite be if he tests 100 people?
a. 80
b. 50
c. 40
d. 100
Ans: A
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