A manager asked her employees how many times they had given blood in the last year. The results of the survey are given below.
The random variable x represents the number of times a person gave blood and P(x) represents the probability of selecting an employee who had given blood that percent of the time. What is the mean number of times a person gave blood based on this survey?
x 0 1 2 3 4 5 6
P(x) 0.30 0.25 0.20 0.12 0.07 0.04 0.02
A) 3.0 B) 2.0 C) 1.6 D) 0.14
Question 2
A researcher randomly selected 100 adults aged 18-25 and 100 adults aged 50-60. Within each age group, she recorded the number of smokers.
A) qualitative, dependent B) qualitative, independent
C) quantitative, independent D) quantitative, dependent
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