#4 There is some evidence that increasing the amount of calcium in one\'s diet c
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#4 There is some evidence that increasing the amount of calcium in one's diet can lower blood pressure. In an experiment, one group of men was given a daily calcium supplement, while a control group received a placebo. The seated systolic blood pressure for each man was measured before the treatments began and again after 12 weeks. The initial blood pressure readings are as follows. Calcium | 107 110 123129 112 111 107 112 136 102 Placebo 123 109 112 102 98 114 110 112 110 130 Construct a back-to-back stemplot of these data. #5 You are part of the staff of a member of Congress who is considering voting in favor of a controversial bill. You report that 1,131 letters dealing with the topic of the bill have been received from her constituents, of which 882 oppose the legislation. Briefly explain what issue would prevent you from concluding that a majority of her constituents oppose the bill. #6 The following data set consists of weight measurements (in grams) of a random sample of 50 rats used by a researcher for behavioral studies. (This data set is also available on Blackboard as RatWt1.txt.) 101 143 123 127 138 127 136 130 105 136 116 128 151 123 112 100 153 116 122 128 115 124 165 139 129 127 141 121 145 146 119 133 133 115 166 127 141 118 110 151 (a) For these data, construct a frequency distribution using the classes 100 -109, 110-119, etc. Include the relative frequencies for each class. (b) Construct a histogram for these data, using an appropriate scale.Explanation / Answer
#4)
Stem and Leaf Plot:
Calcium Placebo Leaf Stem(10) Leaf 8 9 92 10 277 94220 11 0122 3 12 39 0 13 6Related Questions
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