Expert answer:week 3 teams worksheet UOP
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Week 3 Practice Worksheet Answer Key
PSY/315 Version 7
University of Phoenix Faculty Material
Week 3 Practice Worksheet Answer Key
Prepare a written response to the following questions. Type your answers into the shaded boxes below.
Each correct answer is worth one point unless otherwise noted. Week 2 Practice Worksheet is worth 23
points.
Note: Each team member should compute the following questions and submit them to the Learning Team
forum. The team should then discuss each team member’s answers to ascertain the correct answer for
each question. Once your team has answered all the questions, submit one finalized team worksheet.
1. On a standard measure of hearing ability, the mean is 300, and the standard deviation is 20. Provide
the Z scores for persons whose raw scores are 340, 310, and 260. Provide the raw scores for
persons whose Z scores on this test are 2.4, 1.5, and -4.5.
A raw score of 340 equals z score
A raw score of 310 equals z score
A raw score of 260 equals z score
Z score of 2.4 equals raw score
Z score of 1.5 equals raw score
Z score of – 4.5 equals raw score
2. Using the unit normal table, find the proportion under the standard normal curve that lies to the right
of each of the following:
(a)
z = 1.00
(b)
z = -1.05
(c)
z=0
(d)
z = 2.80
(e)
z = 1.96
3. Suppose the scores of architects on a particular creativity test are normally distributed. Using a
normal curve table (pp. 477–480 of the text), what percentage of architects have Z scores
a. Above .10?
Copyright © 2016, 2014 by University of Phoenix. All rights reserved.
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Week 3 Practice Worksheet Answer Key
PSY/315 Version 7
b. Below .10?
c.
Above .20?
d. Below .20?
e. Above 1.10?
f.
Below 1.10?
g. Above -.10?
h. Below -.10?
4. A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 102
students (N = 102). He selects students by waiting at the door to the classroom prior to his lecture
and pulling aside every third student to give him or her a questionnaire.
a. Is this sample design an example of random sampling? Explain.
b. Assuming that all students attend his class that day, how many students will the instructor select
to complete his questionnaire?
5. Suppose you were going to conduct a survey of visitors to your campus. You want the survey to be
as representative as possible.
a. How would you select the people to survey?
b. Why would that be your best method?
Copyright © 2016, 2014 by University of Phoenix. All rights reserved.
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