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PLS 205 Discussion 1 1/6/2015. Outline Tips about the course Population statistics vs. samples statistics Z and t distributions Use of normal distribution.

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Presentation on theme: "PLS 205 Discussion 1 1/6/2015. Outline Tips about the course Population statistics vs. samples statistics Z and t distributions Use of normal distribution."— Presentation transcript:

1 PLS 205 Discussion 1 1/6/2015

2 Outline Tips about the course Population statistics vs. samples statistics Z and t distributions Use of normal distribution – One tailed vs. two tailed test – How to use the probability calculator for Z and t Tips on homework question How to test for normal distribution

3 Questions?

4 Tips about the course Logins! – Username: Kerberos ID – Password: Kerberos Password Discussion format: – Time for student questions – Small lecture – Evaluation halfway through quarter

5 Tips for the course Questions to homework problems – During my office hours or by arrangement – Coding questions will not be answered via email Homework: – Start homework early – Work together – Review HW tips on website

6 Tips for the course Quiz: – 5% of your grade – start looking at the questions now – Try to answer the questions as we go through the topics…do not wait until the night before!!

7 Population Statistic vs. Sample Statistic Population Estimates are based on the measurement of all the individuals in a population Greek letters are used to represent the parameters – e.g. µ, σ, and N Sample Estimates are based on the measurement of a sample from a population Greek letters are not used to represent the parameters – e.g. Ῡ, s, and n

8 Z and t Distributions

9 One-tailed vs two-tailed How to use probability calculator for Z and t

10 Tips on homework question 2.1.4 for HW1 NOTE: If you missed the discussion please ask during office hours.

11 How to Test for Normal Distribution


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