Harper MTH165 Homework Section 2.3 Latest 2020 MAY

MTH165 ELEMENTARY STATISTICS

Homework Section 2.3

In this section you learned about two more graphs for quantitative data.

•             What graph was discussed in this section that can be used when data are collected for one quantitative variable?

•             What graph was discussed in this section that can be used when data are collected for two quantitative variables?

Fill in the following as you work through your given problems in MyOpenMath

1.Fill in the following in the context of this problem:

Individual object: ______

Variable info collected from each object: ____ _________________________________

a.Data were collected for __       _________________variable(s)

Is a stem-and-leaf plot appropriate for this type of data and number of variables? _____

b.Complete the stem-and-leaf plot:

Stems                        Leaves

                5                             

                6             

                7             

                8             

                9             

c.  If you were to make the histogram, what shape would it be? ____ ___________________

2.            Fill in the following in the context of this problem:

Individual object: _______________ _________________________________

Variable info collected from each object: __________ ____________________________

a.            Data were collected for __          ____ __________________variable(s)

Is a stem-and-leaf plot appropriate for this type of data and number of variables? __yes____

b.            Complete the stem-and-leaf plot:

Stems                        Leaves

                5             

                6                             

7             

                8             

                9             

c.             If you were to make the histogram, what shape would it be? _____

3.            Fill in the following in the context of this problem:

Individual object: ________________ ________________________________

Variable 1 info collected from each object: ____ __________________________________

Variable 2 info collected from each object: _____ _________________________________

a.            Since ___________data were collected for _quantitative_ variable(s), the correct graph to make is a ______ ____

b.            Use StatCrunch to make the scatterplot.  Print and attach graph.

c.             Describe the relation between the variables:

___As we increase the value of house value annual rental income tends to increase____________________________________________________________________________

4.            Fill in the following in the context of this problem:

Individual object: _________21 random selected countries for the year 2011_______________________________________

Variable 1 info collected from each object: _____ _________________________________

Variable 2 info collected from each object: ____ __________________________________

a.            Since ___________data were collected for quantitative__ variable(s), the correct graph to make is a ____ _______

b.            Use StatCrunch to make the scatterplot.  Print and attach graph.

c.             Describe the relation between the variables:

____As we increase the value of fertility rate, average life expectancy tends to decrease