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Honors Probability and Statistics End of Year Review Flashcards | StudBud
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Honors Probability and Statistics End of Year Review
In regression, what are the residuals?
A POSITIVE residual means...
Honors Probability and Statistics End of Year Review
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1
A POSITIVE residual means...
The point is on the line
The residual plot is curved
The point is below the line
The point is above the line
2
In regression, what are the residuals?
Diff. between response & values predicted by regression line
Factors unexplained by the data
Data points which were recorded after formal investigation
Possible models unexplored by the investigator
3
Which of the following is a TRUE statement?
Correlation of 0 means a strong linear relationship
Correlation can be greater than 1
Correlation is computed for categorical & quantitative data
Correlation is NOT a unit measure
4
In a normal distribution P(-1.25 < Z < 1.25) is
.3944
.6825
.7887
.1056
5
What does the point labeled 'C' on the boxplot represent?
Q1
Q3
Median
Mean
6
Two events that cannot occur at the same time are said to be
Dependent
Independent
Separatists
Mutually Exclusive
7
The correlation between eye color and amount of TV watched is 0.78, what does this tell you?
Both A & B
This is not possible!
The scatterplot's form is linear
The strength is moderate
8
The difference between bar graphs and histograms lies on which axis?
There is no difference
y-axis
x-axis
9
_____________ can be used to display quantitative variables.
Box Plots
Histograms
Pie Graphs
Bar Graphs
10
The stemplot shows number of books read by a random sample of students Which statement is true?
The college median is equal to the high school median
All of the above
One college student read 7 books
The mean is greater than the median in both groups
11
According to the Empirical Rule, what percentage of the data values will lie within 2 SD of μ?
99.7%
75%
68%
95%
12
Which of the following statements are true?
Both data sets have the same range
Both A and B
Both data sets are symmetric
Neither A or B
13
Which of the following statements are true?
The distribution is left skewed with no outliers
The distribution is left skewed with one outlier
The distribution is right skewed with one outlier
The distribution is right skewed with no outliers
14
The z-score tells how many ______ you are from the center.
means
numbers
spaces
standard deviations
15
Selecting every 5th person who enters a room is an example of stratified sampling.
False
True
16
Which of the following correlations is NOT possible?
Amount of hours studying & test score
Height & weight
Hair color & number of pets you own
Years of experience & salary
17
A _______________ places an individual into one of several groups or categories.
pie chart
categorical variable
bar graph
quantitative variable
18
_____________ is an individual observation that falls outside the overall pattern of the graph.
Shape
Outlier
Spread
Center
19
What is the shape of this distribution?
skewed negatively
skewed positively
symmetric
approximately symmetric
20
What is the shape of this distribution?
symmetric
skewed to the right
approximately symmetric
skewed to the left
21
________________ can be used to display categorical variables
Bar Graphs
Histograms
Box Plots
Pie Graphs
