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Introduction to Probability and Statistics II Flashcards | StudBud
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Introduction to Probability and Statistics II
Introduction to Probability and Statistics II
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Answers
1
Which of the following is NOT a Discrete Probability Function.
Binomial
Poisson
Hypergeometric
Exponential
2
Define the random variable x (lower case).
x = {0, 1, 2, 3, 4}
x = the number of events Wendy attends in a month
None of the above
x = (35%, 25%, 20%, 10%, 10%}
3
The _ accounts for measurement mistakes and the effect of missing variables that would contribute to the response var Y.
Correlation
Error term
Slope
Intercept
4
Normal distribution is a type of discrete probability function.
True
False
5
What is the mean and standard deviation of a standard normal distribution?
(1, 1)
(0, 0)
(0, 1)
(1, 0)
6
The line that is as close as possible to all points is called
Line of Best Fit
The Best Fit Line
Line of Sight
Line of Fire
7
Which graph is used to visualize the correlation of two variables?
Pictograph
All of the above
Pie Chart
Scatterplot
8
Which of the following statements describes a positive correlation between X and Y?
When X increases, Y increases.
When X increases, Y stays the same.
When Y decreases, X increases.
When X decreases, Y decreases.
9
If the population follows an exponential distribution, the sample means will also follow an exponential distribution.
False
True
10
In regression, the independent variables should be strongly correlated.
False
True
