# PSYCH 625 ASSIGNMENT WEEK 1 DESCRIPTIVE AND INFERENTIAL

**PSYCH 625 ASSIGNMENT WEEK 1 DESCRIPTIVE AND INFERENTIAL**

COMPLETE BOTH PART A AND B BELOW.

Part A

Before completing the following questions, be sure to have read

Appendix C and the Statistical Software Resources at the ends of

Chapters 2 and 3 from Statistics Plain and Simple.

Highlight the required answers to the question in your Excel output.

1. Using Microsoft® Excel®, enter the following data from the 40

participants by first creating a variable labeled "Score". Next, compute

the mean, median, and mode for the following set of 40 reading scores:

2. Imagine you are the assistant manager of a fast food store. Part of

your job is to report which special is selling best to the store manager at

the end of each day. Use your knowledge of descriptive statistics and

write one paragraph to let the store manager know what happened today.

Use the following data.

Special number Sold Cost

Huge Burger 20 $2.95

Baby Burger 18 $1.49

Chicken Littles 25 $3.50

Porker Burger 19 $2.95

Yummy Burger 17 $1.99

Coney Dog 20 $1.99

Total specials sold 119

3. Suppose you are working with a data set that has some different

(much larger or much smaller than the rest of the data) scores. What

measure of central tendency (mean, median or mode) would you use and

why?

4. During the course of a semester, 10 students in Mr. Smith's class took

three exams. Use Microsoft® Excel® to compute all the descriptive

statistics for the following set of three test scores over the course of a

semester. Which test had the highest average score? Which test had the

smallest amount of variability? How would you interpret the differences

between exams, and note the range, means, and standard deviations over

time?

5. For each of the following, indicate whether you would use a pie, line,

or bar chart, and why:

a. The proportion of freshmen, sophomores, juniors, and seniors in a

particular university

b. Change in GPA over four semesters

c. Number of applicants for four different jobs

d. Reaction time to different stimuli

e. Number of scores in each of 10 categories

NO RESPONSES

6. Using the data from question 1, create a frequency table and a

histogram in Microsoft® Excel®.

Part B

Answer the questions below. Be specific and provide examples when

relevant.

Cite any sources consistent with APA guidelines.

Question Answer

What are statistics and how are they used in the behavioral sciences?

Your answer should be 100 to 175 words.

Providing examples of each, compare and contrast the four levels of

measurement. Your answer should be 175 to 350 words.

Differentiate between descriptive and inferential statistics. What

information do they provide? What are their similarities and differences?

Your answer should be 175 to 350 words.

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