Question: Researchers have reported that the projected life expectancy for people diagnosed with human immuno - deficiency virus (HIV) and receiving antiretroviral therapy (ART) is 24.2 years (Schackman et al., 2006). Imagine that the researchers determined this by following 250 people with HIV who were receiving ART and calculating the mean. (The 24.2 is actually a projected number rather than a mean for a sample.)
a. What is the variable of interest?
b. What is the population?
c. What is the sample?
d. For the population, describe what the distribution of scores would be.
e. For the population, describe what the distribution of means would be.
f. If the distribution of the population was skewed, would the distribution of scores likely be skewed or approximately normal? Explain your answer.
g. Would the distribution of means be skewed or approximately normal? Explain your answer.