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1. This table lists the numbers of officers and enlisted personnel for women in military. At = 0.05, is there sufficient evidence to conclude that a relationship exists between rank and branch of the Armed Forces?

 

                        Officers           Enlisted           Total

            Army   10791  62,491 73282

            Navy   7816    42,750 50566

            Marine Corps  932      9525    10457

            Air Force        11819  54,344 66163

            Total   31358  169110            200468

2. Listed is information regarding organ transplantation for three different years. Based on these data, is there sufficient evidence at = 0.01 to conclude that a relationship exists between year and type of transplant?

 

            Year    Heart   Kidney/Pancreas         Lung    Total

            2003    2056    870      1085    4011

            2004    2016    880      1173    4069

            2005    2127    903      1408    4438

            Total   6199    2653    3666    12518

3. The amount of sodium in one serving for a random sample of three different kinds of foods listed. At the 0.05 level of significance, is there sufficient evidence to conclude that a difference in mean sodium amounts exists among condiments, cereals, and deserts?

 

            Condiments    Cereals            Desserts

            270      260      100

            130      220      180

            230      290      250

            180      290      250

            80        200      300

            70        320      360

            200      140      300

4. Americans appear to be eating healthier. Between 1970 and 2007 the per capita consumption of broccoli increased 1000% from 0.5 to 5.5 pounds. A nutritionist followed a group of people randomly assigned to one of three groups and noted their monthly broccoli intake. At = 0.05, is there a difference in means?

 

            Group A          Group B          Group C

            2          2          3.7

            1.5       1.5       2.5

            0.75     4          4

            1          3          5.1

            1.3       2.5       3.8

            3          2          2.9

5. The average local cell phone monthly bill is $50.07. A random sample of monthly bills from three different providers is listed below. At = 0.05, is there a difference in mean bill amounts among providers?

 

            Provider X      Provider Y      Provider Z

            48.2     105.02 59.27

            60.59   85.73   65.25

            72.5     61.95   70.27

            55.62   75.69   42.19

            89.47   82.11   52.34

 

6. Annual child care costs for infants are considerably higher than for older children. At = 0.05, can you conclude a difference in mean infant day care costs for different regions of the United States?

 

            New England  Midwest          Southwest

            10390  9449    7644

            7592    6985    9691

            8755    6677    5996

            9464    5400    5386

            7328    8372   

7. Three popular fast-food restaurant franchises specializing in burgers were surveyed to find out the number of calories in their frequently ordered sandwiches. At the 0.05 level of significance, can it be concluded that a difference in mean number of calories per burger exists?

 

            FF#1    FF#2    FF#3

            970      1010    740

            880      970      540

            840      920      510

            710      850      510

 

 

 

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