Question

The table below shows the average amounts spent per week by men and women In each of four spending categories:

	A	B	C	D
Men	$54	$27	$105	$22
Women	$21	$85	$100	$75

What method provides the best descriptive graph?

	1.	Pie chart
	2.	Bar chart
	3.	Side by side bar charts
	4.	Two pie charts

The first step in the solution of a simple regression problem is to :

	a.	Calculate the mean of the independent variable, the mean of the dependent variable, and use them to calculate the correlation coefficient.
	b.	Compute slope of regression line
	c.	Compute value of y-intercept
	d.	Compute the regression equation

Answer 1

Method provides the best descriptive graph is,

Answer:

3.Side by side bar charts

Explanation: we plot the average amount spend per week on Y-axis and Four categories on X axis. The male and female should be shown on side by side bar on X - axis under each category . Hence the side by side bar charts is best descriptive graph for given data.

The first step in the solution of a simple regression problem is to :

Answer:

b. Compute slope of regression line

Explanation: Fist compute slop of regression line then use it for calculation of intercept and finally compute equation of regression line.