Question

An occupational psychologist wishes to assess two different methods of manager supervision in influencing employee productivity. One method involves constant supervision by the workplace manager, while the second method involves intermittent (every 15 minutes) supervision by the workplace supervisor.

To test whether constant versus intermittent supervision may
influence workplace productivity differently, the psychologist
first randomly selects 8 employees at his/her organization. Over
the course of two weeks, each of the *n* = 8 employees is
exposed to each of the two different supervision conditions. To
control for any order effects, half of the participants were
randomly assigned to receive constant supervision first, whereas
the other half were randomly assigned to receive intermittent
supervision first. After each week of supervision, the psychologist
measures the productivity of each employee using a *Productivity
Scale*. The scale ranges from a score of 0-35 (where higher
numbers indicate higher levels of productivity).

*Based on the above information, select True or
False:*

*1. True/False:* The type of Supervision Condition is the
independent variable in this data set. The levels are: 1: Constant
Supervision and 2: Intermittent Supervision

*2. True/False:* The Productivity scores from the
*Productivity Scale* is the dependent variable in this data
set.

3. *True/False:* The design of this study is
within-subjects. Thus, a repeated-measures *t-test* should
be conducted.

4.

*5. Based on the above information, choose the correct set of
null and alternative hypotheses for this test:*

H H |
||

H H |
||

H H |
||

H H |

6. **QUESTION:** Determine the critical region
for this test at **α (alpha) = .01**

*Please type either "directional" or
"non-directional" in the blank below. Please
remove the quotations for your answer!*

According to the researchers hypothesis, this is a ___________ hypothesis test.

*Please type a WHOLE number (e.g. 5) as your answer for the
blank below.*

The degrees of freedom for this hypothesis test is ________.

*Please type a number rounded to the nearest
THOUSANDTHS place (e.g. 2.971) as your answer for
the blank below.*

*Please include either or both +/- signs
before each value as you value for the blank below (e.g.
+/-2.971).*

The value of the critical region of this hypothesis test is _________

Answer #1

. True: The type of Supervision Condition is the independent variable in this data set. The levels are: 1: Constant Supervision and 2: Intermittent Supervision

2. True: The Productivity scores from the Productivity Scale is the dependent variable in this data set.

3. False: The design of this study is within-subjects. Thus, a repeated-measures t-test should be conducted.

4.

5. Based on the above information, choose the correct set of null and alternative hypotheses for this test:

H0: μ1 = μ2

H1: μ1 ≠ μ2

6. According to the researchers hypothesis, this is a "non-directional" hypothesis test.

7. The degrees of freedom for this hypothesis test is 8+8-2 = 14

8. The value of the critical region of this hypothesis test is
-The value of the critical region of this hypothesis test is -2.145
and , +2.145

Do college students enjoy playing sports less than watching
sports? A researcher randomly selected ten college students and
asked them to rate playing sports and watching sports on a scale
from 1 to 10 with 1 meaning they have no interest and 10 meaning
they absolutely love it. The results of the study are shown
below.
Playing Vs. Watching Sports
Play
6
2
4
7
5
10
5
1
7
9
Watch
5
3
6
6
6
10
7
2...

In a bumper test, three types of autos were deliberately crashed
into a barrier at 5 mph, and the resulting damage (in dollars) was
estimated. Five test vehicles of each type were crashed, with the
results shown below. Research question: Are the mean crash
damages the same for these three vehicles?
Crash Damage ($)
Goliath
Varmint
Weasel
1,600
1,290
1,090
760
1,400
2,100
880
1,390
1,830
1,950
1,850
1,250
1,220
950
1,920
Click here for the Excel Data File
Fill...

Problem #2
Bumble likes going to his local Subway and always orders a
foot-long meatball sandwich there, as he finds the satisfaction he
gets from a foot-long sandwich to be priceless. Over the past
month, however, Bumble has been constantly hungry. He suspects the
meatball sandwiches at his local Subway to be shrinking on average.
Bumble has randomly sampled 20 of those ‘supposedly’ one-foot-long
(12 inches) meatball sandwiches at that local Subway and has found
a sample mean length of...

Problem #2
Bumble likes going to his local Subway and always orders a
foot-long meatball sandwich there, as he finds the satisfaction he
gets from a foot-long sandwich to be priceless. Over the past
month, however, Bumble has been constantly hungry. He suspects the
meatball sandwiches at his local Subway to be shrinking on average.
Bumble has randomly sampled 20 of those ‘supposedly’ one-foot-long
(12 inches) meatball sandwiches at that local Subway and has found
a sample mean length of...

What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
Blaine, a seaport town in northwest
Washington state.
Meanwhile, several members of...

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