PSYC 354 Homework 3 Central Tendency and Variability

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PSYC 354 Homework 3 Central Tendency and Variability

Questions 17

Questions 1-4 Fill in the highlighted blanks to answer/complete the statements.

The arithmetic average of a set of numbers is the mean. 2) What is an outlier?

3) Which widely-used measure describes the typical amount or distance a score deviates from the mean in any given distribution? 3. Standard Deviation (-2) correction from professor 4) What is the mathematical relationship between variance and standard deviation?

Part I: Concepts

These questions are based on the Nolan and Heinzen reading and end-of-chapter questions. Question 5

For the following terms, write the equivalent mathematical symbol (letter or letters) for the sample statistic. Question 6a-6c These are the winning percentages for 11 baseball players for each ones best 4-year pitching performance: 6-c ) Compare the mean and median. Does the difference between them suggest that the data are skewed very much? 6-a) What is the mean of the scores? (Compute this using a calculator): 6-b) What is the median of these scores? Explain. Question 7

Recall the interactive graph from Homework 2 depicting household income and location in New York City.

Based on this module/weeks reading, why do you think the author of this graph chose the median household income instead of the mean household income to describe central tendency? Part II: SPSS Analysis Green and Salkind Course Text, Lesson 21: Exercises 1, 4, 7, and 8

Questions 1 and 4 o Green and Salkind Text, Lesson 21 o Lesson 21 Exercise File 1 (located under courses Assignment Instructions folder) Part II: Exercises 1a-1d and Exercise 4

Green and Salkind, Lesson 21, Exercises 1 and 4 Open Lesson 21 Exercise File 1 in order to complete these exercises. Part III: SPSS Data Entry and Analysis

The steps will be the same as the ones you have been practicing in Part I of the assignment; the only difference is that you are now responsible for creating the data file, as well. Remember to do the following:

a) Name and define your variables under the Variable View, then return to the Data View to enter the data; and b) Paste all SPSS output and graphs into your homework file at the appropriate place.

Part III: Questions 1-4

The following data are taken from the Bureau of Labor Statistics surveys from the years 20092013. They represent the average weekly pay for wage and salary earners measured at 4 different quarters each year and broken down by gender.