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1. find P25 for the...

1. find P25 for the following data: 2 6 3 4 2 1 2 0 1 3 6 3

2. you are given the following frequency distribution for the # XXXXX errors 10 students made in a test.

ERRORS FREQUENCY

0-2 14

3-5 13

6-8 11

9-11 8

12-14 9

Find: a)variance and b)standard deviation

3. An aptitude test has a mean of 220 and standard deviation of 10. Find the corresponding z score for a) a test score of 232 and b) a test score of 212

4. you are given the following data:

x y

2 14

3 13

4 11

5 8

5 9

7 4

7 3

Find a) SS(x), b) SS(y), c) SS(xy), d) the linear correlation coefficient, r, e) the slope b1, f) the y-intercept, b0 (small zero) and g) the equation of the line of best fit.

2. you are given the following frequency distribution for the # XXXXX errors 10 students made in a test.

ERRORS FREQUENCY

0-2 14

3-5 13

6-8 11

9-11 8

12-14 9

Find: a)variance and b)standard deviation

3. An aptitude test has a mean of 220 and standard deviation of 10. Find the corresponding z score for a) a test score of 232 and b) a test score of 212

4. you are given the following data:

x y

2 14

3 13

4 11

5 8

5 9

7 4

7 3

Find a) SS(x), b) SS(y), c) SS(xy), d) the linear correlation coefficient, r, e) the slope b1, f) the y-intercept, b0 (small zero) and g) the equation of the line of best fit.

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