Question Details

PSYCH 625 WEEK 1 Assignment Time to Practice

Brief item decscription

Solution for the following questions (Recent Updated Answers)


Item details:

Time to Practice – Week One

 

 

 

 

 

 

 

 

Complete both Part A and Part B below.

 

 

 

 

 

 

 

Part A

 

 

 

 

 

 

 

 

Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate Statistics. This data is available on the student website under the Student Test Resources link.

 

 

 

 

 

 

 

 

1. By hand, compute the mean, median, and mode for the following set of 40 reading scores:

 

 

 

 

SUMMARY

 

 

 

 

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. Compute the means for the following set of scores saved as Ch. 2 Data Set 3 using IBM®SPSS®software. Print out a copy of the output.

 

 

 

 

 

 

 

 

Hospital size (number of beds)

 

 

 

Infection rate (per 1,000 admissions)

 

 

234

 

 

 

1.7

 

 

214

 

 

 

2.4

 

 

165

 

 

 

3.1

 

 

436

 

 

 

5.6

 

 

432

 

 

 

4.9

 

 

342

 

 

 

5.3

 

 

276

 

 

 

5.6

 

 

187

 

 

 

1.2

 

 

512

 

 

 

3.3

 

 

553

 

 

 

4.1

 

 

 

 

 

 

 

 

3. You are the manager of a fast food store. Part of your job is to report which special is selling best to the boss at the end of each day. Use your knowledge of descriptive statistics and write one paragraph to let the boss know what happened today. Use the following data. Do not use IBM®SPSS®software to compute the statistics needed; rather, do it by hand. Include a copy of your work.

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

4. 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 would you use and why?

 

 

 

 

 

 

 

 

5. For the following set of scores, compute the range, the unbiased and the biased standard deviations, and the variance. Do the exercise by hand.

 

 

 

 

 

 

 

 

31, 42, 35, 55, 54, 34, 25, 44, 35

 

 

 

 

 

 

 

 

Why is the unbiased estimate greater than the biased estimate?

 

 

 

 

 

 

 

 

6. Use IBM®SPSS®software 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?

 

 

 

 

 

 

 

 

Test 1

 

 

 

Test 2

 

 

 

Test 3

 

 

50

 

 

 

50

 

 

 

49

 

 

48

 

 

 

49

 

 

 

47

 

 

51

 

 

 

51

 

 

 

51

 

 

46

 

 

 

46

 

 

 

55

 

 

49

 

 

 

48

 

 

 

55

 

 

48

 

 

 

53

 

 

 

45

 

 

49

 

 

 

49

 

 

 

47

 

 

49

 

 

 

52

 

 

 

45

 

 

50

 

 

 

48

 

 

 

46

 

 

50

 

 

 

55

 

 

 

53

 

 

 

 

 

 

 

 

7. This practice problem uses the data contained in the file named Ch. 3 Data Set 3. There are two variables in this data set.

 

 

 

 

 

 

 

 

Variable

 

 

 

Definition

 

 

Height

 

 

 

Height in inches

 

 

Weight

 

 

 

Weight in pounds

 

 

 

 

 

 

 

 

Using IBM®SPSS®software, compute all of the measures of variability you can for height and weight.

 

 

 

 

 

 

 

 

8. Review the following frequency distribution. Create a histogram either by hand or by using some other application such as a Microsoft®Excel®document.

 

 

 

 

 

 

 

 

Class interval

 

 

 

Frequency

 

 

90–100

 

 

 

12

 

 

80–89

 

 

 

14

 

 

70–79

 

 

 

20

 

 

60–69

 

 

 

24

 

 

50–59

 

 

 

28

 

 

40–49

 

 

 

29

 

 

30–39

 

 

 

21

 

 

20–29

 

 

 

15

 

 

10–19

 

 

 

17

 

 

0–9

 

 

 

12

 

 

 

 

 

 

 

 

9. A third-grade teacher is looking to improve her students’ level of engagement during group discussions and instruction. She keeps track of each of the 15 third graders’ number of responses every day for 1 week. This information is available in Ch. 4 Data Set 2. Use IBM®SPSS®software to create a bar chart (one bar for each day).

 

 

 

 

 

 

 

 

10. Identify whether these distributions are negatively skewed, positively skewed, or not skewed at all, and why.

 

 

 

 

 

 

 

 

a. This talented group of athletes scored very high on the vertical jump task.

 

 

 

 

b. On this incredibly crummy test, everyone received the same score.

 

 

 

 

c. On the most difficult spelling test of the year, the third graders wept as the scores were delivered.

 

 

 

 

 

 

 

 

11. 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

 

 

 

 

 

 

 

From Salkind (2011). Copyright © 2012 SAGE. All Rights Reserved. Adapted with permission.

 

 

 

 

 

 

 

Part B

 

 

 

 

 

 

 

 

Complete the questions below. Be specific and provide examples when relevant.

 

 

 

 

 

 

 

 

Cite any sources consistent with APA guidelines.

 

 

 

 

 

 

 

 

Question

 

 

 

Answer

 

 

Salkind (2011) describes statistics as a “set of tools” (p. 18). How do behavioral scientists use those tools?

 

 

 

 

 

How would you use descriptive statistics to report the effectiveness of a baseball team? How would you use inferential statistics to report the effectiveness of a baseball team? In this example, what is the sample and what is the population?

 

 

 

 

 

What does a measure of central tendency tell us about a data set? Identify the three common measures of central tendency used in descriptive statistics and give an example of each. How do you calculate them?

 

 

 

 

 

What is variability in a data set? Identify three measures of variability used in descriptive statistics, explain how to calculate each, and give an example of each.

 

 

 

 

 

 

 

 

 

 

 

 

University of Phoenix Material

 

 

 

 

 

 

 

 

Basic Concepts in Statistics

 

 

 

 

 

 

 

 

Complete the following questions. 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 200 words.

 

 

 

 

 

Differentiate between descriptive and inferential statistics. What information do they provide? What are their similarities and differences? Your answer should be 250 to 400 words.

 

 

 

 

 

What is a population? What is a sample? How are they similar and how are they different? When would you use one or the other? Your answer should be 250 to 400 words.

 

 

 

 

 

Complete the following problem:

 

 

 

 

Go to the library and find a journal article in your area of interest that contains empirical data, but does not contain any visual representation of the data. Use the data to create a chart. Specify what type of chart you are creating, and why you chose the one you did. You can create the chart manually or using IBM® SPSS® software or a Microsoft® Excel®document. The chart may be pasted into this document or submitted as an attachment with this document.

 

 

 

 

From Salkind (2011), p. 75. Copyright © 2012 Pearson Education. All Rights Reserved. Adapted with permission.

 







About this question:
STATUS
Answered
QUALITY
Approved
ANSWER RATING


This question was answered on: Feb 08, 2016

Solution-000407380


Pay using PayPal (No PayPal account Required) or your credit card. All your purchases are securely protected by PayPal.
SiteLock

Need a similar solution fast, written anew from scratch? Place your own custom order

We have top-notch tutors who can help you with your essay at a reasonable cost and then you can simply use that essay as a template to build your own arguments. This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student. New solution orders are original solutions and precise to your writing instruction requirements. Place a New Order using the button below.

Order Now