A self-selected sample is one in which the individuals choose themselves to be in the sample....
- A self-selected sample is one in which the individuals choose themselves to be in the sample.
True
False
- The least squares method minimizes which of the following sum of squares?
|
a. |
|
|
|
b. |
||
|
c. |
||
|
d. |
All of these choices are true. |
- The denominator in the calculation of the sample covariance, cov (x,y), is:
|
a. |
n |
|
|
b. |
2n − 1 |
|
|
c. |
n − 1 |
|
|
d. |
n − 2 |
- If arrivals follow a Poisson probability distribution, the time between successive arrivals must follow
|
a. |
a uniform probability distribution. |
|
|
b. |
a normal probability distribution. |
|
|
c. |
a Poisson probability distribution. |
|
|
d. |
an exponential probability distribution. |
Homework Answers
A self-selected sample is one in which the individuals choose themselves to be in the sample. TRUE
The sample covariance formula is 
The denominator in the calculation of the sample covariance, cov
(x,y), is 
.
Correct choice is (C).
If arrivals follow a Poisson probability distribution 
, the time between successive arrivals must follow 
distribution.
The inter-arrival times follow : an exponential probability distribution.
Correct choice is (D).
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