Transcript Week 3 512 review questionsx

Week 3: Ungraded
review questions
Can you explain your
answer?
 Use your fingers to indicate your
answer: 1=A, 2=B, 3=C, 4=D. For
“check all that apply,” use your both
hands.
 After viewing the question, show me
your answer in 15 seconds.
 Next, turn to your neighbor and you
have one minute to convince
him/her that you are right.
According to the Canadian Rask
Force for Preventive Health Care,
an experiment is classified as a
(Check all that apply):
A. Level 1 study
B. Level II-1 study
C. Level II-2 study
D. Level II-3 study
E. Level III study
Today non-experimental research is
considered as good as, or even better
than experimental research. What
is(are) reason(s)?
A.
Non-experimental studies have better external
validity because they are done in the real world
whereas experimental studies have difficulties in
generalizing findings in a controlled setting to a
naturalistic setting.
B.
Usually the sample size of experiments is relatively
small but observational studies utilize big data
analytics.
C. Classical statistical procedures for experimental
research relies on one analysis with one sample
while data mining can be fine-tuned by machine
learning.
D.
All of the above
Which of the following
statement(s) is(are) false?
A. JMP has a contextual menu for the
user to determine what the next step
is based on the initial output.
B. JMP has a dynamic graphing
environment for the user to ask
“what-if” questions.
C. SPSS has both contextual menus and
dynamic graphics.
D. The full name of JMP is John’s
Macintosh Program and therefore
JMP works better in Mac OS.
You use “Fit Y by X” in JMP to inspect
the data pattern. You suspect that
there are some outliers. What would
you do? (Check all that apply)
A. Use a 97% density ellipse to verify which
observations are outliers.
B. Hide and exclude those outliers by leftclicking the suspicious observations in
the data.
C. Do a robust fit to down-weight the
outliers
D. Do a non-linear fit so that the regression
line can go through he outliers.
In theory there are four levels of
measurement, but in practical
computing there are three only.
What are they?
A. Nominal, ordinal, interval
B. Nominal, ordinal, ratio
C. Nominal, ordinal, continuous
D. Nominal, interval, ratio
You use “Distribution” in JMP to inspect the
variable “gender.” According to the code
book, “1” is “male and “2” is “female.”
You found that some participants report
“3”. What would you do?
A. Hide and exclude those observations
B. Leave them intact. Use ANOVA (for three
groups) instead of the t-test (for 2
groups).
C. Use the names or IDs of the participants
to find out their correct gender. Then fix
the data.
D. Ask the legal consul at APU
You use “Fit Y by X” in JMP to look at the
variable “test scores” and “gender.” What
you see is a dot plot showing the test
score distribution by gender. What would
you do next?
A. Run a t-test from the contextual menu.
B. Leave JMP. Use SPSS to run a t-test. It
shows the t-test result right away.
C. Examine whether the data structure
meets the parametric assumptions, such
as normality and equal variances. If yes,
proceed to the t-test. If not, use nonparametric tests.
One of the parametric assumptions of the
t-test and ANOVA is that the data are
normally distributed. Why?
A. Because the population is usually normal,
we want a sample that can represent the
population.
B. The statement is incorrect. The normality
assumption is not about the data. Rather,
it requires that the residual is normally
distributed.
C. Because the sampling distribution is
normal and we want the mean to be an
unbiased estimator.
One of the parametric assumptions of the
t-test and ANOVA is that the data are
normally distributed. Why?
A. Because the population is usually normal,
we want a sample that can represent the
population.
B. The statement is incorrect. The normality
assumption is not about the data. Rather,
it requires that the residual is normally
distributed.
C. Because the sampling distribution is
normal and we want the mean to be an
unbiased estimator.
JMP cannot directly open a SPSS file.
You need to save the SPSS file into
the Excel format, and then open the
Excel Spreadsheet in JMP.
A. True
B. False
Which of the following file format
cannot be output by JMP?
A. JMP report
B. MS Word/RTF
C. Excel
D. HTML/Interactive HTML
E. MP3/MP4