HW Check--Suppose you wanted to estimate the mean time 7th graders spend on homework each night. You decide to do this by taking a random sample of 7th grade students. You will calculate the mean time spent doing homework for your sample. You will then use your sample mean as an estimate of the population mean.
a. The sample mean has sampling variability. Explain what this means.
"Sampling variability means..."
b. Abel recommends using a sample size of 20 students, while Babel recommends using a sample size of 40. Which would you choose? Explain your answer.
"I would choose... because..."
#1: Makes an accurate claim about data sets
#2: Accurately uses relevant vocabulary: "means", "sample size", or"variability"