PSY 0371 Week 1 Assignment 2 | San Francisco State University | Assignment Help
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- 24 May 2021
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PSY 0371 Week 1 Assignment 2 | San Francisco State University | Assignment Help
Homework 2
Continue to record the following information every day (up through
December 1, 2020):
1. the number of hours
of sleep you got;
2. the number of cups
of caffeine drinks you had;
3. the number of cups
of non-caffeinated drinks you had;
4. the number of hours
you spent looking at a phone, computer screen, TV, etc.
(NOTE: round hours to the nearest half hour ; count each drink - however
big or small - as one drink. And remember to report the date on which you
recorded your data.)
For the second homework assignment, use the number of hours of sleep you
get for the five weekdays this week (Monday, Sept. 21 through Friday, Sept.
25). For these data (N=5), answer the following questions:
1. Report the raw data
(and the date for each).
2. Compute the mean
and the median of the raw data in (1) above. Based solely on the
relationship between the mean and the median, would you say that the
distribution of scores is symmetrical, negatively skewed, or positively skewed?
3. Transform the data
in (1) above by subtracting the mean that you computed in (2) from each
score. Report the resulting set of transformed scores. Compute the
mean of this set of transformed scores. (Hint: If you start with N=5
scores in (1), you should get 5 transformed scores for (3) -- one for each of
the original 5 scores in (1).)
4. Square each of the
transformed scores that you obtained in (3). Compute the mean of these
squared scores.
5. List all possible
samples of size n=3 that you can obtain from the raw data you reported in (1)
above. For each sample of size n=3 that you listed, compute the mean of
the sample. What is the mean of these sample means. (Hint: there is
a total of 10 ways to choose samples of size n=3 from the N=5 scores you report
in (1). So you should get 10 sample means -- one for each of the samples
of size n=3 that you list.)
This homework assignment is due in one week, i.e., by Monday, September
28. Please submit your homework assignment to the GTA of your lab
section.
The homework assignment is based on all of the readings now available
for this section on the Mean. I will post future announcements, reading
materials, and homework assignments below under the section on the Variance and
the Standard Deviation.
USA 
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