Answer 2.6 please

Example 2.2 Motorcycle Helmets-Can You See Those Ears? The U.S. Department of Transportation established standards for motorcycle helmets. To comply with these standards, helmets should reach the bottom of the motorcyclist's ears. The report "Motorcycle Helmet Use in 2014-Overall Results" (National Highway Traffic Safety Administration, January 2015) summarized data collected by observing 806 motorcyclists nationwide at selected roadway locations. Each time a motorcyclist passed by, the observer noted whether the rider was wearing no helmet, a noncompliant helmet, or a compliant helmet. Using the coding N = no helmet NH = noncompliant helmet CH = compliant helmet a few of the observations were CH N CH NH N CH CH CH N N There were 796 additional observations, which we didn't reproduce here. In total, there were 250 riders who wore no helmet, 40 who wore a noncompliant helmet, and 516 who wore a compliant helmet. The corresponding relative frequency distribution is given in Table 2.1. TABLE 2.1 Relative Frequency Distribution for Helmet Use Helmet Use Category Frequency Relative Frequency No helmet 250 0.310 -250/806 Noncompliant helmet 40 0.050 40/806 Compliant helmet 516 0.64 306 1.000 Total numb Should add to 1. of observations but in some cases may be slightly off due to rounding From the relative frequency distribution, you can see that a large number of the riders (31%) were not wearing a helmet, but most of those who wore a helmet were wearing one that met the Department of Transportation safety standard. at a particular station ir 2.6 For each of the five data sets described, answer the n following three questions and then use Figure 2.2 to select r- an appropriate graphical display. st Question 1: How many variables are in the data set? Question 2: Are the variables in the data set categorical or numerical? Question 3: Would the purpose of a graphical display be to summarize the data distribution, to compare groups, or to investigate the relationship between two numerical variables