Line of Best Fit & Correlation Coefficients Warm Up
คำถามทั้งหมด: 17
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1.
What is the correlation for the following Scatter Plot.
a)
Weak Positive
b)
No Correlation
c)
Strong Negative
d)
Weak Negative
e)
Strong Positive
2.
What is the correlation for the following Scatter Plot.
a)
Weak Positive
b)
No Correlation
c)
Strong Negative
d)
Weak Negative
e)
Strong Positive
3.
What is the correlation for the following Scatter Plot.
a)
Weak Positive
b)
No Correlation
c)
Strong Negative
d)
Weak Negative
e)
Strong Positive
4.
Given the following Scatter Plot, select the option that is most likely the r value.
a)
r=.27
b)
r=−.862
c)
r=.934
d)
r=.54
5.
Given the following Scatter Plot, select the option that is most likely the r value.
a)
r=−.45
b)
r=−.981
c)
r=.728
d)
r=.12
6.
A perfect negative correlation has a correlation coefficient of ____.
a)
1
b)
-1
c)
0
7.
A perfect positive correlation has a correlation coefficient of ____.
a)
1
b)
-1
c)
0
8.
Which scatter plot diagram shows the strongest positive correlation?
a)
b)
c)
d)
9.
The correlation coefficient is a number "r" such that:
a)
-1<r<1
b)
-1>r>1
c)
-1≤r≤1
d)
-1≥r≤1
10.
The scatter plot shows the number coffee shops in different cities and the number of violent crimes. Which of the following is NOT true?
a)
A) As the number of coffee shops increase, violent crimes appears to increase.
b)
B) The line of best fit (regression line) shows a positive correlation
c)
C) The data has a positive correlation coefficient
d)
D) An increase in coffee shops causes an increase in violent crimes
11.
As x increases, y increases
a)
A) correlation coefficient
b)
B) causation
c)
C) positive association
d)
D) negative association
12.
Is this line an accurate line estimate of best fit for the data?
a)
Yes
b)
No
13.
Is this line an accurate line estimate of best fit for the data?
a)
Yes
b)
No
14.
Which line is the best line of best fit?
a)
a
b)
b
c)
c
d)
i don't see any lines
15.
The table shows the height of a tree for various years after it was planted. Using the line of best fit, how tall would the tree be 30 years after it was planted?
a)
22 feet
b)
23 feet
c)
36 feet
d)
37 feet
16.
find line of best fit using calculator through these points (0,0)(1,2) (3,5) (6,7)
a)
y=65x+7
b)
y=1.14x+.64
c)
y=1.5x+64
17.
What is the line of best fit?
a)
f(x)= 5x+1.82
b)
cannot be determined
c)
f(x)= 1.82x + 5.02
d)
f(x)= 1.1x + 4.2
แป้นคำตอบ
Line of Best Fit & Correlation Coefficients Warm Up
คำถามทั้งหมด: 17
1.
b)
No Correlation
2.
c)
Strong Negative
3.
e)
Strong Positive
4.
c)
r=.934
5.
b)
r=−.981
6.
b) -1
7.
a) 1
8.
a)
9.
c) -1≤r≤1
10.
d)
D) An increase in coffee shops causes an increase in violent crimes