Which of the following statements are TRUE for Mann-Whitney U test? I. Data is normally distributed II. Can only be used to test two groups III. Converted into ranks IV. No assumption on variances homogeneity a. I, II, III & IV b. II, III & IV c. I, II & III d. II & III

Which of the following statements are TRUE for Mann-Whitney U test? I. Data is normally distributed II. Can only be used to test two groups III. Converted into ranks IV. No assumption on variances homogeneity a. I, II, III & IV b. II, III & IV c. I, II & III d. II & III

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

Which of the following statements are TRUE for Mann-Whitney U test?

I. Data is normally distributed

II. Can only be used to test two groups

III. Converted into ranks

IV. No assumption on variances homogeneity

I, II, III & IV

II, III & IV

I, II & III

II & III

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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