Transcript PLS 205 Discussion 1 - Plant Sciences Department

PLS 205 Discussion 1
1/6/2015
Outline
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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
Questions?
Tips about the course
• Logins!
– Username: Kerberos ID
– Password: Kerberos Password
• Discussion format:
– Time for student questions
– Small lecture
– Evaluation halfway through quarter
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
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!!
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
Z and t Distributions
One-tailed vs two-tailed
How to use probability
calculator for Z and t
Tips on homework question 2.1.4 for
HW1
NOTE: If you missed the discussion please ask
during office hours.
How to Test for Normal Distribution