test1aoct2006 - M ath 1P98 Test 1a 5:15-6:15 Name Student...

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Math 1P98 Test 1a October 13 2006 5:15-6:15 Name. ........................................................... Student Number. ................... BOX. ......... Answers should be rounded to at least 3 significant digits, more digits are fine. Use fractions where specified. A non graphing calculator can be used, one that has no more than 3 lines of display. One half sheet of handwritten coloured paper can be brought to the test. Marks for each question are in the margin, plan your time well. Good Luck! ........................................................................................................................................... [2] 1. For a sample of logs, the time for which each burned with flames ( measured in minutes) was 30, 28, 26, 35, 40. Using your calculator, the mean time is . .................... minutes, the standard deviation is . ............... minutes. [6] 2. Fire logs made of recycled coffee grounds can be purchased and are advertized as lasting between 2 to 3 hours. The following histogram shows the times for which a sample of these logs had flames. a. The median occurs in the class with midpoint . ............. . b. The class width is . ........................ c. If an ogive was drawn, the point at the right end of the ogive line has coordinates . ......... and . ........... d. The mean burning time is . ..................... Formula used : e. The formula to find the standard deviation of the burning time is : (don't calculate) [3] 3. Beside a fireplace there are 4 different sized coffee ground logs and 5 irregular
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This note was uploaded on 05/03/2011 for the course MATH 1p98 taught by Professor Miners during the Fall '10 term at Brock University.

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test1aoct2006 - M ath 1P98 Test 1a 5:15-6:15 Name Student...

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