If bricks are fired at a temperature above 1125f they

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Understandable Statistics: Concepts and Methods
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Chapter 6 / Exercise 10
Understandable Statistics: Concepts and Methods
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13. If bricks are fired at a temperature above 1125°F, they will crack and must be discarded. If the bricks are placed randomly throughout the kiln, what is the percentage of bricks that crack during the firing process? A) 0.62% B) 2.28% C) 47.72% D) 49.38%
14. When glazed bricks are put in the oven, if the temperature is below 900°F they will discolor. If the bricks are placed randomly throughout the kiln, what percentage of glazed bricks will discolor?
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Understandable Statistics: Concepts and Methods
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Chapter 6 / Exercise 10
Understandable Statistics: Concepts and Methods
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Use the following to answer questions 15-16: In a statistics class with 136 students, the professor records how much money each student has in their possession during the first class of the semester. The histogram shown below represents the data he collected: 15. What is approximately the percentage of students with under $10.00 in their possession?
16. What is approximately the number of students with $30.00 or more in their possession?
17. An outlier is ______. A) a point in a scatterplot that follows the same pattern as the other points B) a point in a scatterplot that does not follow the same pattern as the other points C) All of the above. D) None of the above.
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18. A softdrink machine can be regulated so that it discharges an average of ounces per cup. If the ounces of fill are Normally distributed with a standard deviation of 0.4 oz, what value should be set at so that 6-oz cups will overflow only 2% of the time?
19. A consumer group surveyed the prices for white cotton extra-long twin sheet sets in five different department stores and reported the average price as $16. We visited four of the five stores, and found the prices to be $12, $15, $17, and $22. Assuming that the consumer group is correct, what is the price of the item at the store that we did not visit?
Version 1 Page 7
Version 1 Page 8 Use the following to answer question 20: Malaria is a leading cause of infectious disease and death worldwide. It is also a popular example of a vector-borne disease that could be greatly affected by the influence of climate change. The scatterplot shows total precipitation (in mm) in select cities in West Africa on the x -axis and the percent of people tested positive for malaria in the select cities on the y -axis in 2000.

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