STATS 250 Lecture Notes - Lecture 5: Statistical Parameter, Confidence Interval, Response Bias

• School: U of M
• Department: Statistics
• Course: STATS 250
• Professor: Nadiya Fink

Document Summary

Collecting and using data wisely, descriptive statistics = describing data using numerical summaries (e. g. , mean, Bias: a study is bias if it favors a certain outcome, bias and variability y t i l i b a i r a v h g. Select random sample of registered voters and ask them this question via phone call (1) response bias - they may say they are going to vote but ultimately don"t. A study examined how external clues influence student performance. Undergraduate students were randomly assigned to one of four different forms for their midterm exam. Form 1 was printed on blue paper and contained difficult questions, while form 2 was also printed on blue paper but contained simple questions. Form 3 was printed on red paper, with difficult questions, and form 4 was printed on red paper with simple questions.