# HW4 - Chapter 8. Is There Really a Difference? Introduction...

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Unformatted text preview: Chapter 8. Is There Really a Difference? Introduction to Statistical Hypothesis Testing Name: Class: Date: From Kiess and Green’s Statistical Concepts for the Behavioral Sciences, 4/e Assignment 8.1 The purpose of this assignment is to help you to become more comfortable in recognizing what each statistical symbol and formula in Chapter 8 represents. For each item in the table below either the term, symbol, or definition is given. Complete the following table with the missing information. For example, for the two-tailed test , provide the definition in the appropriate column. It is best to complete this page without looking at your notes or textbook. Once you have completed it, refer back to your notes and textbook to verify you are correct. Term Symbol Definition (also include formula as appropriate) Two-tailed test None α The probability of failing to find a statistically significant difference when H 1 is true None The area on a normal distribution or t distribution that marks when you reject H 0 and accept H 1 Confidence interval Null hypothesis df Power Alternative hypothesis z obs t crit Chapter 8. Is There Really a Difference? Introduction to Statistical Hypothesis Testing Name: Class: Date: From Kiess and Green’s Statistical Concepts for the Behavioral Sciences, 4/e Assignment 8.2 For each of the following data sets, calculate a z test comparing X to μ . Then, for each value of z obs , indicate if you reject or fail to reject H . Use a two-tailed test with α = .05. Set N μ σ X z Reject H A 100 555 45 560 B 64 400 40 385 C 729 985.5 48.6 990 D 25 100 15 103 E 2500 40 5 40.2 F 121 27.3 33 20.4 G 256 100 15 103 H 2500 560 139 560 I 36 2.5 3 3 J 400 1.75 2 1.8 Chapter 8. Is There Really a Difference? Introduction to Statistical Hypothesis Testing Name: Class: Date: From Kiess and Green’s Statistical Concepts for the Behavioral Sciences, 4/e Assignment 8.3 The purpose of this assignment is to help you practice finding critical value and rejection regions for the one-sample t test. For each value of N given, find the df . Then, with α = .05, indicate the value of t crit for a two-tailed test. On what page in your textbook will you find the table for identifying the critical value for a one-sample t test?...
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## This note was uploaded on 03/15/2010 for the course PSYCHOLOGY 100B taught by Professor Firstenberg,i. during the Winter '10 term at UCLA.

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HW4 - Chapter 8. Is There Really a Difference? Introduction...

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