STATS Exam Final, Dr. Smith, Cedarville University
How are ranks determined? - ANSWER-Start with lowest number, make a list of each value from least to greatest, determine how many of each number there are in list. (see Ch.13 Day 1 worksheet)
Sign Test - ANSWER-Ch. 13 Worksheet Day 1
Wilcoxon Rank Sum Test is also known as? - ANSWER-Mann-Whitney U Test
What are Wilcoxon Rank Sum Tests for? - ANSWER-To test two independent samples to see if they have different medians
Ho: Wilcoxon Rank Sum Test - ANSWER-The two samples come from populations with
equal medians
H1: Wilcoxon Rank Sum Test - ANSWER-The median of the first population is different from the median from the second population
What tailed test is Wilcoxon Rank Sum test? - ANSWER-2-tailed
What are the requirements of Wilcoxon Rank Sum test? - ANSWER-Two Independent Random Samples Each sample has more than 10 values Tests must be done in SPSS
What do we use for One-way ANOVA tests? - ANSWER-ANOVA: Single Factor
What tests do not require that samples come from populations with normal distributions or any other particular distributions? - ANSWER-Nonparametric tests (Distribution-Free tests)
Advantages of nonparametric tests - ANSWER-- Less rigid requirements = wider variety of situations
- Can be applied to more data types such as ranks and categorical data
Disadvantages of nonparametric tests - ANSWER-- Tend to waste information as exact numerical data are often reduced to a qualitative form
- Not as efficient, needs stronger evidence to reject null hypothesis
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