test1_f05

test1_f05 - First Exam - Fall 2005 - ST 370 Distance - A...

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First Exam - Fall 2005 - ST 370 Distance - A Circle the answer. All questions are worth 5 points. 1. Which of the following correctly characterizes a randomized complete block experiment? A. At least one of the experimental variables is a blocking variable. B. Experimental units are allocated at random to treatments within each block. C. It can be thought of as a collection of “mini” completely randomized experiments. D. Every treatment combination appears in each block. E. All of the above. 2. A small sample is given by 62, 81, 50, 96. The sample median is A. 65.5 B. 50.0 C. 81.0 D. 71.5. E. none of the above. 3. For the sample in Problem 2., the sample standard deviation is (to two decimals) A. 126.88 B. 18.41 C. 13.01 D. 20.34 E. none of the above. The next three questions refer to the following table of sample frequencies for a sample of size n = 82: [0 - 1) 1 [1 - 2) 2 [2 - 3) 5 [3 - 4) 8 [4 - 5) 13 [5 - 6) 10 [6 - 7) 22 [8 - 9) 21 [9 - 10) 0 The notation means that there are two sample values in [1,2), ±ve in [2,3), etc. 4. Although we do not know the exact sample values, the ±rst quartile must be in the following cell: A. [2 - 3) B. [3 - 4) C. [4 - 5) D. [5 - 6) E. None of these. 1
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5. These data appear to be A. skewed to the left (negative skewness) B. skewed to the right (positive skewness) C. symmetric D. None of the above. 6. The sample range must be
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test1_f05 - First Exam - Fall 2005 - ST 370 Distance - A...

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