Unit 5, Lesson 18# Sampling Variability and the Effect of Sample Size

EngageNY 45 min(s)

Students use data from a random sample to estimate a population mean. Students know that increasing the sample size decreases the sampling variability of the sample mean. In particular, they need the population tables, the random digit table, and the dot plot of student sample mean values. Remind students that the goal of the investigation in the previous lesson was to answer the statistical question, "What is the typical time spent at the gym for people in a population of gym members?"