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(1.) Starting with the data...

(1.) Starting with the data values 70 and 100, add three data values to the sample so that the mean is 87, the median is 88, and the mode is 88.

(2.) A class of 15 kindergarteners had the following weights in pounds:

36 48 40 49 53 44 49 40

51 52 50 35 44 48 43

Find the mean, variance, and standard deviation.

(3. ) An aptitude test has a mean of 44 and standard deviation of 7. Find the corresponding z scores for:

- a test score of 111

- a test score of 153

(4.) Nine households had the following number of children per household:

4, 5, 4, 4, 1, 3, 8, 5, 1

Find the mean, median, mode, range, and midrange for these data.

(5.)You are given the following data.

x

y

2

11

3

19

4

4

5

19

5

2

7

14

7

6

Find:

- SS(x)

- SS(y)

- SS(xy)

- The linear correlation coefficient, r

- The slope b1

- The y-intercept, b0

(2.) A class of 15 kindergarteners had the following weights in pounds:

36 48 40 49 53 44 49 40

51 52 50 35 44 48 43

Find the mean, variance, and standard deviation.

(3. ) An aptitude test has a mean of 44 and standard deviation of 7. Find the corresponding z scores for:

- a test score of 111

- a test score of 153

(4.) Nine households had the following number of children per household:

4, 5, 4, 4, 1, 3, 8, 5, 1

Find the mean, median, mode, range, and midrange for these data.

(5.)You are given the following data.

x

y

2

11

3

19

4

4

5

19

5

2

7

14

7

6

Find:

- SS(x)

- SS(y)

- SS(xy)

- The linear correlation coefficient, r

- The slope b1

- The y-intercept, b0

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