Week 1 Assignment Due January 19 th , 11:59pm 1) Answer the following questions (1/2 point each) a. What is the difference between a sample and a population? i. Sample – Specific group from population to be studied if population size is too large ii. Population – Group being studied b. What are confounding variables? Describe an example. i. Things that cause sample bias ii. Any other variable that would have an effect on the study 1. Ex) lack of exercise leads to weight gain yet the age of the people in the study would all take effect of their ages are all different c. What is sampling error? Describe an example. i. A function of how many people you have ii. Error we are likely to see in our result due to sample sizes iii. The smaller the sample size the more likely you’ll see sampling error and to conclude differences you see are real 1. Ex) a group of 100 students in a class vs 5 students in a class d. What is sampling bias? Describe an example. i. An actual difference about your samples that is throwing off the results 1. Ex) different students taking different class for different reasons
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- Spring '13