Question

1.1 Fuel Economy. (mpg) of model year 2016 motor vehicles Here is a small part of a data set that describes the fuel economy in miles per gallon Make and Vehicle Class Transmission Number of City Highway Annual Fuel Model Type Cylinders mpg mpg Cost Subaru Im Compact preza Nissan Juke Small station Manual Manual 4 25 34 $900 4 28 34 1,100 wagon Midsize Hyundai Elantra GT Automatic 24 $950 19 Chevrolet Im Large pala Automatic 29 1,150 The annual fuel cost is an estimate assuming 15,000 miles of travel a year (55% city and 45% highway) and an average fuel price (a) What are the individuals in this data set? (b) For each individual, what variables are given? Which of these variables are categorical, and which are quantitative? In what units are the quantitative variables measured? 1.3 Social Media Preferences for Younger Audiences. media over all ages, with 65% using Facebook most often among those using social media sites. Howev- er, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking site or service do you use most often" here are the top sites chosen by Americans aged 12-24 who currently use any social networking site or service Facebook remains the top choice of social SOCMEDIA Social Media Site Facebook Instagram Snapchat Twitter Google+ Pinterest Percentage Who Use Most Often 43% 18% l 5% 8% 4% 3% What is the sum of the percentages for these top social media sites? What percent of Americans aged 12-24 use other social media sites most often? (a) (b) Make a bar graph to display these data. Be sure to include an "Other social media site" category (c) Would it be correct to display these data in a pie chart? Why or why not? TABLE 1.2 Percent of state population aged 18-34 who are minorities State Alabama Alaska Arizona Arkansas California Percent State Percent State 39 Louisiana 40 Maine 51 Maryland 31 Massachusetts 67 Michigan 35 Minnesota 39 Mississippi 23 Missouri 52 Montana 51 Nebraska 75 Nevada 20 New Hampshire 42 New Jersey 23 New Mexico 16 New York 27 North Carolina 17 North Dakota 45 Ohio 23 37 27 26 31 8 Oklahoma 52 Oregon 31 Pennsylvania 28 Rhode Island 23 South Carolina 48 South Dakota 23 Tennessee 15 Texas 23 Utah 54 Vermont Connecticut Delaware Florida 19 30 61 Hawaii Idaho Illinois Indiana lowa Virginia 51 Washington 67 West Virginia 48 Wisconsin 41 Wyoming 15 District of Columbia 34 18 Kentucky 53 Choosing Classes in a Histogram. The data set menu that accompanies the One-Variable Statistical Calculator applet includes the data on the percent minorities between the ages of 18 and 34 in the states from Table 1.2. Choose these data, then click on the "Histogram" tab to see a histogram (a) How many classes does the applet choose to use? (You can click on the graph outside the bars to get a count of classes.) (b) Click on the graph and drag to the left. What is the smallest number of classes you can get? What are the lower and upper bounds of each class? (Click on the bar to find out.) Make a rough sketch of this histogram. Click and drag to the right. What is the greatest number of classes you can get? How many observa- tions does the largest class have? You see that the choice of classes changes the appearance of a histogram. Drag back and forth until you get the histogram that you think best displays the distribution. How many classes did you use? Why do you think this is best? (c) (d)

Answer 1

1.1.

The units of the variable Make and Model like Subaru Impreza, Nissan Juke etc. are the individuals in the data set.

Vehicle class, Transmission type, Number of Cylinders, Highway, City, Annual Fuel Cost-these variables are given for each individual.

Categorical Variables- Vehicle class, Transmission type

Quantitative Variables- Number of Cylinders, Highway, City, Annual Fuel Cost

City and Highway measured in mpg & Annual Fuel Cost measured in Dollar.

As per HOMEWORKLIB RULES we should answer only the first question with its sub-parts. So I have answered that. Please post the other questions differently mentioning your requirements.