This is a 2-hour timed closed book exam. You can use a

This is a 2-hour timed closed book exam. You can use a calculator (not your phone) for calculations.
Questions:
Facebook remains the top choice of social media over all ages, with 65% using Facebook most often among those using social media sites. However, 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:
Social Media Site Percentage Who Use Most Often
Facebook 43%
Instagram 18%
Snapchat 15%
Twitter 8%
Google+ 4%
Pinterest 3%
a)  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?
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 below gives the number of active nurses per 100,000 people in each state.
Why is the number of nurses per 100,000 people a better measure of the availability of nurses than a simple count of the number of nurses in a state?
Make a stemplot that displays the distribution of nurses per 100,000 people. The data will first need to be rounded. What units are you going to use for the stems? The leaves? You should round the data to the units you are planning to use for the leaves before drawing the stemplot. Write a brief description of the distribution. Are there any outliers? If so, can you explain them?
Active Nurses per 100,000 people, by state
State Nurses
State Nurses
State Nurses2
Alabama. 911
Louisiana. 881
Ohio. 1021
Alaska. 717
Maine 1093
Oklahoma 742
Arizona 585
Maryland 906
Oregon 803
Arkansas 798
Massachusetts 1260
Pennsylvania 1030
California 630
Michigan 849
Rhode Island 1104
Colorado 831
Minnesota 1093
South Carolina 834
Connecticut 1017
Mississippi 950
South Dakota 1296
Delaware 1155
Missouri 1038
Tennessee 984
Florida 814
Montana 855
Texas 678
Georgia 665
Nebraska 1054
Utah 635
Hawaii 689
Nevada 609
Vermont 914
Idaho 682
New Hampshire 1006
Virginia 764
Illinois 901
New Jersey 858
Washington 814
Indiana 901
New Mexico 614
West Virginia 953
Iowa 1022
New York 848
Wisconsin. 946
Kansas 934
North Carolina 940
Wyoming 864
Kentucky 1003
North Dakota 968
District of Columbia 1483
Most mobile usage occurs via apps, particularly on smartphones, with time on smartphone apps now surpassing time spent on desktops in the United States. Digital media can be accessed on mobile platforms by using apps on a smartphone or tablet or by using a browser on a smartphone or tablet, or it can be accessed on the more traditional desktop platform (including laptops). Here is the breakdown of the share of digital media time by access method in the United States, Canada, and the United Kingdom:
a)  Draw a bar graph for the distribution of the method for Canada. Do the same for the United States and United Kingdom, using the same scale for the percent axis.
b)  Describe the most important difference in the distributions of the share of digital time by access method for the three countries. How does this difference show up in the bar graphs?
c)  Explain why it is appropriate to use a pie chart to display any of these distributions. Draw a pie chart for each distribution. Do you think it is easier to compare the three distributions with bar graphs or pie charts? Explain your reasoning.
The final grades of 80 mathematics students are recorded in the following table:
68
73
61
66
96
79
65
86
84
79
65
78
78
62
80
67
75
88
75
82
89
67
73
73
82
73
87
75
61
97
57
81
68
60
74
94
75
78
88
72
90
93
62
77
95
85
78
63
62
71
95
69
60
76
62
76
88
59
78
74
79
65
76
75
76
85
63
68
83
71
53
85
93
75
72
60
71
75
74
77
Create a Histogram and describe it.
Find the lowest grade.
Find the highest grade.
Find the sample mean or average.
Find the median.
Calculate the standard deviation.
Show the Five Number Summary
From the data below, find the correlation between height and weight in individuals. Show the corresponding chart.
S.No
Height (cm)
Weight (Kg)
1
110
44
2
116
31
3
124
43
4
129
45
5
131
56
6
138
79
7
142
57
8
150
56
9
153
58
10
155
92
11
156
78
12
159
64
13
164
88
14
168
112
15
174
101