8. Two Variable Data Analysis
Interactive practice questions
Consider the following set of data.
The equation of the least squares line fitted to this data is approximately $y=3.15-0.18x$y=3.15−0.18x.
| $x$x | $0.8$0.8 | $1.77$1.77 | $2.7$2.7 | $3.62$3.62 | $4.9$4.9 | $5.7$5.7 | $7$7 | $8.6$8.6 | $10.1$10.1 |
|---|---|---|---|---|---|---|---|---|---|
| $y$y | $3.4$3.4 | $2.9$2.9 | $2.5$2.5 | $2.4$2.4 | $1.9$1.9 | $1.9$1.9 | $1.8$1.8 | $1.7$1.7 | $1.54$1.54 |
a
Predict the value of $y$y when $x=3$x=3 using the least square line.
b
Is this an interpolation or extrapolation?
Interpolation
A
Extrapolation
B
Easy
1min
Consider the following set of data.
The equation of the least squares line fitted to this data is approximately $y=3.15-0.18x$y=3.15−0.18x.
Easy
< 1min
Consider the following set of data.
The equation of the least squares line fitted to this data is approximately given by $\text{Average test score}=70.34-1.92\times\text{Number of tests}$Average test score=70.34−1.92×Number of tests.
Easy
1min
A least squares regression line is given by $y=3.59x+6.72$y=3.59x+6.72.
Medium
1min
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