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Scatter Plot and Linear Regression Analysis of Household Grocery Expenditures - Prof. Eun-, Assignments of Data Analysis & Statistical Methods

Millikin University (MU)Data Analysis & Statistical Methods
Prof. Eun-Joo Lee

Instructions for completing exercise 5 in ma 220, which involves analyzing the relationship between the number of household members and weekly grocery expenditures using a scatter plot and best-fitting line. Six data points are given, and the exercise asks to draw the scatter plot, find the best-fitting line, and discuss the implications of a seventh household's grocery expenditure.

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Pre 2010

Uploaded on 08/16/2009

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MA 220
E. Lee
Exercise 5
1. The number of household members, xand the amount spent on groceries per week, y
are measured for six households in a local area.
x2 2 3 4 1 5
y$46 $60 $68 $101 $36 $131
(a) Draw a scatter plot of these six data points.
(b) Find the best-fitting line relating yto xfor the data and draw the line with your
scatter plot in (a).
(c) Suppose you found that a seventh household with two members spent $120 on
groceries. Discuss about it.

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MA 220

E. Lee

Exercise 5

  1. The number of household members, x and the amount spent on groceries per week, y are measured for six households in a local area.

x 2 2 3 4 1 5

y $46 $60 $68 $101 $36 $

(a) Draw a scatter plot of these six data points.

(b) Find the best-fitting line relating y to x for the data and draw the line with your scatter plot in (a).

(c) Suppose you found that a seventh household with two members spent $120 on groceries. Discuss about it.