practiceexam12004

practiceexam12004 - Stat 2004 Practice Exam 1 In 1798 the...

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Unformatted text preview: Stat 2004 Practice Exam 1 . In 1798 the English scientist Henry Cavendish measured the density of the earth with great care. It is common practice to repeat careful measurements several times and use the mean as the final result. Cavendish repeated his work 29 times. Here are the results (the data give the density of the earth as a multiple of the density of water): 5.50 5.61 4.88 5.07 5.26 5.55 5.36 5.29 5.58 5.65 5.57 5.53 5.62 5.29 5.44 5.34 5.79 5.10 5.27 5.39 5.42 5.47 5.63 5.34 5.46 5.30 5.75 5.68 5.85 What is the mean, rounded to two decimal places? 5.44 5.42 5.43 5.45 2 . Refer back to question one. What is the median? 5.46 5.295 5.615 5.85 3 . The Sanchez household is about to install solar panels to reduce the cost of heating their house. In order to know how much the solar panels help, they record their consumption of natural gas before the panels are installed. The table below gives the data for 16 months. Heating degree-days are the usual measure of demand for heating. One degree-day is accumulated for each degree a day’s average temperature falls below 65 degrees. An average temperature of 20 degrees Fahrenheit, for example, corresponds to 45 degree-days.example, corresponds to 45 degree-days....
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practiceexam12004 - Stat 2004 Practice Exam 1 In 1798 the...

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