What measure of central tendency would you use and why


Assignment: Descriptive and Inferential Statistics Worksheet

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. UsingMicrosoft Excel, enter the following data from the40 participants by first creating a variable labeled "Score".Next, compute the mean, median, and mode for the following set of 40 reading scores:

31

32

43

42

24

34

25

44

23

43

24

36

25

41

23

28

14

21

24

17

25

23

44

21

13

26

23

32

12

26

14

42

14

31

52

12

23

42

32

34

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 managerat the end of each day. Use your knowledge of descriptive statistics and write one paragraph to let the store managerknow 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 notethe range, means, and standard deviations over time?

Test1

Test2

Test3

90

94

95

65

75

90

51

77

91

88

84

93

72

88

92

75

84

90

60

75

83

78

85

90

80

80

92

84

88

94

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

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.

Citeany 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?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.

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