Description

Part A

1) What is the idea behind frequency distribution?

2) Which is the common sampling method?

3) What is the measure of central tendency called?

4) What observation basically describes a sample size?

5) What is the measure of dispersion from a mean called?

6) Sample mean or the population mean: which varies the most?

7) Sample mean or individual observation: which varies the most?

8) What is the benefit of increasing the sample size?

9) Numerically characterize a Standard Normal Distribution

10) What is the very important characteristic of t-distribution?

Part B

2) With the following randomly selected observations:

a) Determine the Regression Equation.

b) Determine the value of Y hat when X is 7

X

Y

XY

X2

5

13

3

15

6

7

3

12

4

13

4

11

6

9

8

5

Part C

2) From the following randomly selected observations:

a) Determine the Pearson Coefficient of Correlation, r.

b) Interpret the association between X and Y.

c) Estimate the Coefficient of Determination, R2.

X

X-x

(X- x )2

Y

(Y-y)

(Y-y) 2

(X-x)(Y-y)

5

13

3

15

6

7

3

12

4

13

4

11

6

9

8

5

Tags: population frequency distribution Common sampling method

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