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Cities must find better ways to dispose of solid waste. According to the Environmental Protection Agency, the composition of the 217 million tons of...

1. Cities must find better ways to dispose of solid waste. According to the Environmental Protection Agency, the composition of the 217 million tons of solid municipal waste created in 1997 was:

Paper and paperboard   38.5%

Yard waste                   12.3%

Food waste                   10.6%

Plastics                         9.2%

Metals                           7.4%

Other materials                ?



Determine the percentage of other materials in the solid waste. This category includes glass, wood, rubber, and so on. (Points : 1)       

       24.0%
       22.0%
       19.0%
       18.0%



Question 2. 2. Data from one campus dorm on the number of burglaries are collected each week of the semester. These data are to be grouped into the classes 0–1, 2–3, 3–5, 6-7 8 or more. Both endpoints included. Explain where a difficulty might arise.

Difficulty may arise while putting the data into the class: (Points : 1)

       3-5
       0-1
       8 or more
       6-7

Question 3. 3. A sample of 50 departing airline passengers at the main check-in counter produced the following number of bags checked through to final destinations.

3 1 2 2 1 2 1 2 3 0 1 0

1 1 0 1 3 0 1 2 1 1 1 2

1 2 2 1 2 0 0 2 2 1 1 1

1 1 1 1 2 2 1 3 0 1 2 1

1 3


What proportion of passengers who check in at the main counter fail to check any bags? (Points : 1)

       0.14
       0.16
       0.17
       0.13

Question 4. 4. The city of Madison regularly checks the water quality at swimming beaches located on area lakes. The concentration of fecal coliforms, in number of colony forming units (CFU) per 100 ml of water, was measured each day for fifteen days during the summer at one beach.

With reference to the given data, find the sample 90th percentile. (Points : 1)

       614
       180
       340
       380

Question 5. 5. On opening day one season, 10 major league baseball games were played and they lasted the following numbers of minutes.
167 211 187 176 170 199 198 218 145 232
Find the sample variance. Round your answer to two decimal places. (Points : 1)

       211.5
       176.23
       699.12
       580.14

Question 6. 6. The following summary statistics were obtained from a data set.
= 77.0, s = 7.1
Approximately what proportion of the observations is in the interval 55.7 to 98.3? (Points : 1)

       0.997
       0.5
       0.95
       0.35

Question 7. 7. Calculate the mean for the following data set. Round your answer to first decimal digit.
9 28 4 16 11 33 (Points : 1)

       14.2
       13.5
       16.8
       12.5

Question 8. 8. Calculate the median for the following data set. Round your answer to first decimal digit.
9 28 4 16 11 33 (Points : 1)

       16.8
       13.5
       12.8
       14.1

Question 9. 9. The city of Madison regularly checks the water quality at swimming beaches located on area lakes. The concentration of fecal coliforms, in number of colony forming units (CFU) per 100 ml of water, was measured each day for fifteen days during the summer at one beach.

With reference to the given data:
Find the first quartile. (Points : 1)

       90
       50
       60
       18

Question 10. 10. The city of Madison regularly checks the water quality at swimming beaches located on area lakes. The concentration of fecal coliforms, in number of colony forming units (CFU) per 100 ml of water, was measured each day for fifteen days during the summer at one beach.

With reference to the given data:
Find the third quartile (Points : 1)

       380
       180
       340
       887



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