Math Is Fun Forum

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Statistics

Q.1 Given are five observations for two variables, x and y.
Xi 3 12 6 20 14
yi 55 40 55 10 15
a. Develop a scatter diagram for these data.
b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
c. Try to approximate the relationship between x and y by drawing a straight line through the data.
d. Develop the estimated regression equation by computing the values of b0 and b1.
e. Use the estimated regression equation to predict the value of y when x = 10.

Q.2 The following data give the percentage of women working in five companies in the retail and trade industry. The percentage of management jobs held by women in each company is also shown.
%Working 67 45 73 54 61
% Management 49 21 65 47 33
a. Develop a scatter diagram for these data with the percentage of women working in the company as the independent variable.
b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
c. Try to approximate the relationship between the percentage of women working in the company and the percentage of management jobs held by women in that company.
d. Develop the estimated regression equation by computing the values of b0 and b1.
e. Predict the percentage of management jobs held by women in a company that has 60% women employees.

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Malik

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Statistics

hi Zeeshan 01

You've just copied the questions without giving any indication exactly what help you need.  Can you draw a scatter diagram?  Do you know about correlation?  Can you do the calculations to get the line of regression?

Please help me to help you by saying exactly where you are having difficulties.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: Statistics

Solve.

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Malik

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Statistics

Can you draw a scatter diagram? 

Please answer, YES or NO.

Do you know about correlation? 

Please answer YES or NO.

Can you do the calculations to get the line of regression?

What is the formula for this?

Please post it or answer NO.

B

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Mathegocart

Member

Registered: 2012-04-29

Posts: 2,226

Re: Statistics

Could you(i.e Zeeshan 01) take a look at some statistical concepts and their definitions? This is NOT a "we solve your problems, no strings attached~~" kind of deal, this is a "do your work and we'll help ya out." subforum..

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The integral of hope is reality.
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He will be sorely missed.