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Statistics & Probability Review Flashcards | StudBud
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Statistics & Probability Review
Statistics & Probability Review
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1
What is the purpose of a line of best fit?
Describe the strength of the correlation
Show direction of trend
Make an equation and predict values
Show that there is NO correlation
2
Describe this scatter plot.
Negative Moderate
Positive Weak
Negative Weak
Positive Moderate
3
A line of best fit has an equation y = 15x + 12. If x=4, what is y?
70
72
42
80
4
Fundamental Counting Principle
12
22
6
120
5
What is the probability that you roll an odd number or an even number on a number cube?
25%
1
0
75%
6
The money you have in the bank and your weekly deposit.
No Correlation
Positive Correlation
Negative Correlation
7
What is Andrew's equation to solve for the number of cars washed?
y = 9/4 x
y = 3/4 x
y = 4/9 x
y = 4/3 x + 0
8
Whats is the probability of landing on a 6 on a number cube?
1/6
6/6
2/6
1
9
When drawing a line of best fit, which should you
NOT
do?
Have equal number of points above & below the trend line.
Follow the trend of the data points.
Use a data point for the y-intercept.
Eliminate outliers
10
Line of best fit should be....
Adjust to the outlier
Under the set of points
Above all the set of points
Near all the points
11
What is the probability that the spinner will land on red?
1/4
about even
1/3
impossible
12
Is this a tree diagram
No
Yes
13
What is the circled point in this scatter plot?
Cluster around a line
Outstanding
Outlier
Cluster around a point
14
The relationship between the number of cars in the streets and pollution in the city.
No Correlation
Positive Correlation
Negative Correlation
15
After making a line of best fit, what will you do first in order to write the equation?
calculate slope by rise over run
calculate y-intercept
calculate slope by two points in the line
value of x
16
In this line of best fit, what is the starting heart rate when you rest?
0 bmp
79 bmp
60 bmp
85 bmp
17
What can you say about this scatter plot?
Weak Positive
Strong Negative
Constant
Strong Positive
18
Without computing what is the equation of the line of best fit?
y = 2 x + 40
y = -2x + 40
y =-1/2x - 40
y = 2x - 40
19
Describe the association of this scatter plot.
Weak Positive
No association
Weak Negative
Strong Negative
20
Find the number of outcomes possible if you may choose one item from each category.
18
10
27
8
21
Is this a Tree Diagram?
Yes
No
22
What can you say about this line of best fit?
Incorrectly Placed
Needs to be adjusted higher
Correctly Placed
Should reverse direction
23
What is the probability of the spinner landing on red?
5/7
1/2
5/12
3/4
24
Find the probability.
13/24
0/24
24/24
11/24
