MATH 221 Week 2 DQ Regression

 1. Construct a scatter plot and determine the type of correlation using r for the following data

The ages(in years) of 6 children and the number of words in their vocabulary

Age, x	1	2	3	4	5	6
Vocabulary size,y	250	950	1200	1450	1800	2650

a) Display the data in a scatter plot

b) Calculate the correlation coefficient r

c) Make a conclusion about the type of correlation

Study plan 9.1.22, 9.1.24

2. Suppose the scatter plot shows the results of a survey of 42 randomly selected males ages 24 to 35. Using age as the explanatory variable, choose the appropriate description for the graph, Explain your reasoning.

a) Age and body temperature

b) Age and balance on student loans

c) Age and income

d) Age and height

PLEASE SEE THE DOCUMENT ATTACHED FOR THIS GRAPH

The response variable is ____________ because you would expect this variable and age to have _________________ and ____________variation for adult males.

Study plan 9.2.17

3. 3. Identify the explanatory and the response variable.

A farmer wants to determine if the temperature received by similar crops can be used to predict the harvest of the crop.

The explanatory variable is _________

The response variable is ____________