NARRBEGIN: Home Care
Home Care
Data Are Collected on the Number

Essay

NARRBEGIN: Home Care
Home Care
Data are collected on the number of house calls (x) made in a given week by each of 60 nurses in a certain hospital. The same data set is displayed in each of the three histograms below. NARREND
-The number of houses sold in Miami Springs and the average monthly mortgage rates for 18 months randomly selected between January 2011 and April 2013 are shown in the following table. $$\begin{array} { | c | c | c | c | } \hline\begin{array} { c } \text { Mortgege rate } \\\text { (\%) }\end{array} & \begin{array} { c } \text { Number of } \\\text { houses sold }\end{array} & \begin{array} { c } \text { Mortgege rate } \\\text { (\%) }\end{array} & \begin{array} { c } \text { Number af } \\\text { houses sald }\end{array} \\\hline 7.5 & 90 & 9.5 & 68 \\9.0 & 72 & 6.5 & 97 \\7.0 & 89 & 8.0 & 79 \\10.5 & 62 & 9.0 & 75 \\10.0 & 58 & 10.5 & 53 \\9.5 & 70 & 9.5 & 73 \\8.5 & 74 & 11.0 & 50 \\10.0 & 65 & 7.5 & 82 \\11.0 & 51 & 8.5 & 70 \\\hline\end{array}$$
a.Draw a scatter diagram with the number of houses sold on the vertical axis.
b.Describe the relationship between mortgage rate and number of houses sold.