Fall 2004 Test 2 Math 1P98

# Fall 2004 Test 2 Math 1P98 - Test 2a Math 1P98 Name.Student...

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Test 2a Math 1P98 November 19 2004 Name . ................................................ Student Number . .......................................... BOX . .......................................... You are allowed to bring one regular sized sheet of paper and a non graphing calculator . Any electronic devices with more than two lines of display will be confiscated. Answers should be correct to a minimum of 3 significant digits, to this end be sure to have more digits than this throughout the question. For each multiple choice question, circle the best answer ................................................................................................................................. [3] 1 . The time taken to do an assignment was found, based on a sample of 32 students, to have a mean of 3.4 hours with a standard deviation of 15 minutes. How many more students will have to be surveyed, to be 90% sure of being within 3 minutes of the population mean time. [8] 2. Assume the systolic blood pressure in the general population is normally distributed. It may have different population means for males and females but has the same standard deviation. Construct a 95% confidence interval for the difference between the population mean male and female systolic blood pressure, using the following two random independent samples. Males: 136, 152, 140, 118 Females:109, 129, 116

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[5] 3 . The growth rate of a plant, in cm/week, was measured before and after a day of heavy rainfall, for a sample of 8 plants. The differences between the two growth rates form a normal distribution. The following is a Minitab output of the results.
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Fall 2004 Test 2 Math 1P98 - Test 2a Math 1P98 Name.Student...

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