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
Different parts of the body mature at different rates. “General” refers to the body as a whole: the
Blood Flow Through the Cardiorespiratory System
Blood types and results of donor and recipient combinations.
Neutrophils in a normal blood smear.
Results from Kliegl's study show that older adults can learn complex information-processing
The Body's Response to Blood Loss