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Descriptive statistics worksheet answers

09/01/2021 Client: saad24vbs Deadline: 10 Days


Title


ABC/123 Version X


1


Descriptive and Inferential Statistics Worksheet


PSYCH/625 Version 5


2


University of Phoenix Material


Descriptive and Inferential Statistics Worksheet


Complete both Part A and Part 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:


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. 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?


Test 1


Test 2


Test 3


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.


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.


Copyright © XXXX by University of Phoenix. All rights reserved.


Copyright © 2018 by University of Phoenix. All rights reserved.

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