What are the variance and standard deviation?

1. Text book problems to complete: Chapter Three Work:

Chapter Three Work: p. 122: 3.5, p 123: 3.13, p. 136: 3.40

 

2. Non-text book problems to complete:

A. Use the following population data to complete the next two questions:

50, 62.5, 37.5, 75.0, 45.0, 47.5, 15.0, 25.0

What is the mean?

What are the variance and standard deviation?

B. Use the following data to complete the next three questions:

Data A	10,421;	10,110;	9,862;	10,475;	9,920;	10,592;	11,213;	10,933;	11,134;	10,316
Data B	1,379;	1,356;	1,373;	1,410;	1,389;	1,463;	1,529;	1,499;	1,516;	1,355

What is the sample covariance between Data A and Data B

What is the sample correlation coefficient between Data A and Data B

How would you classify the linear relationship between Data A and Data B?  a. Weak     b. Moderate     c. Strong     d. No relationship

C. Use the following data to complete the next five questions.

A sample of 10 cell phone/cable/Internet bills: $1,589; $593; $1,223; $869; $423; $1,720; $708; $1,425; $922 and $308.

What is the mean and median of the cost?

What is the five-number summary of the cost?

What is the interquartile range of the cost?

Create a boxplot for the data.

Interpret the shape.

 

Please submit all the problems online as an attachment. 

Please submit both the text book and non-text book problems as an attachment online through this assignment link.