test1_2003 - Test 1 5:15-6:15 Name written in the order as...

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Test 1 October 17 2003 5:15 -6:15 Name ...................................................................................... ( written in the order as on your student card with no commas). Assignment box due Day ...................... Time ............ alpha/beta ....................... A half sheet of green paper and a calculator with no more than two lines of display are the only items allowed to be used for this test. Answers should be correct to 3 significant digits throughout. Write final answers on dotted lines .......................................................................................................................................... [3] 1. The number of leaves that have changed to fall colour on five trees is 57 62 78 42 81 a. The median number of leaves is ........................ b. The mean number of leaves is ......................... c. The standard deviation of the number of leaves is ...................... ( use your calculator key no method required.) [4] 2 . Two pyramid shaped dice, each with 4 sides are tossed and the minimum of the two results taken as the score. The histogram gives the results of a sample of 150 such tosses. a. The class width is ........... b. The mode is ............. c. The relative frequency of a score of 3 or greater is .............. d. The mean score is .................. [10] 3. The probability a student in math 1P98 has the $12 suggested calculator from the bookstore is 0.72. Consider 11 students who come in for help. a. Calculate the probability that all 11 have this calculator. Formula and method Prob that all 11 have this calculator is ......
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b. Calculate the probability that more than 9 have this calculator Formula and method Prob that more than 9 have this calculator ..............
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