Fall Semester 2002

Practical Two Fri 4pm SB221 Dec 13

Consider this data:

``` x       y
-------------
1	30
2	28
3	25
4	30
5	25
6	24
7	26
8	20
9	18
10	14
1	28
2	26
3	23
4	28
5	23
6	22
7	24
8	18
9	16
10	16```
Enter the data in Excel then answer the following questions:

1. What's the coefficient of correlation between x and y?
2. What's the slope and intercept of the regression line?
3. Plot the data and add a trendline to it.
4. Can the regression line be used to summarize the values reliably?
5. What's the value of y predicted by the regression line for an x of 4
6. For x = 10 is the measurement of y = 14 above, below, or exactly average?
7. For x = 10 is the measurement of y = 16 above, below, or exactly average?

Last updated: Dec 13, 2002 by Adrian German for `A113`
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