Download ME 322 Class Survey

ME 322 Class Survey
1. What is the name of the following distribution?
a. Normal
b. Exponential
c. Uniform
d. Binomial
2. What is the relationship between the following distributions?
a.
b.
c.
d.
The first is a symmetric version of the second
The second is the expansion of a portion of the first
The second is an inverted version of the first
They are two representations of the same distribution
3. Which of the following does the F-test determine?
a.
b.
c.
d.
Statistical mean difference between two distributions
Statistical standard deviation difference between two distributions
Cumulative difference between two distributions
Number of outliers that do not fit within a statistical model
4. Which of the following does the t-test determine?
a. The hypothesis that a mean falls within a certain range in a distribution
b. The hypothesis that a standard deviation falls within a certain range in a
distribution
c. The greatest difference between the samples in two distributions
d. The data truncation required for a population to match a certain distribution
5. Which of the following is the correct formula for determining the cumulative function
of a continuous distribution?
a. F x    f  d
x

n
b. F x    f i 
i 0
c. F x    f  d
b
a

d . F x    f  d

6. The part labeled 4 in the following picture can be best expressed as:
a.
b.
c.
d.
A BC
A  B ~ C
A ~ B  C
~ A BC
7. If A and B are populations, which of the following are distributions?
a.
b.
c.
d.
f x   PA x   PB x 
f x   PA x 
f x   5PB x 
f x   PA 3  PB 7 
8. If a $2 raffle ticket has a probability of 0.007 of winning $100, a $3 ticket has a
probability of 0.09 of winning $50, and a $5 ticket has a probability of 0.4 of winning
$20, which would be the most statistically sound investment?
a.
b.
c.
d.
the $2 ticket
the $3 ticket
the $5 ticket
the $3 ticket and the $5 ticket are equally favorable
9. Please circle, on the following graph, Sensitivity
where option
2 becomes more favorable than
of EM #1
option 1:
0.8
0.7
Opt. #1
Final Option Grades
0.6
0.5
Opt. #2
0.4
Opt. #1
Opt. #2
Opt. #2
Opt. #1
0.3
0.2
0.1
0
0
0.2
0.4
0.6
0.8
1
1.2
Weight of EM #1
(This is called a sensitivity graph. Where EM stands for evaluation measure which is a
quality by which an option is judged.)