People with diabetes must monitor and control their blood glucose level. The goa

Question

People with diabetes must monitor and control their blood glucose level. The goal is to maintain fasting plasma glucose between about 90 and 130 milligrams per deciliter. Here are the fasting plasma glucose levels of two groups of diabetics: Group A was enrolled in a diabetes control class, five months after the end of the class 78 95 96 103 112 134 141 145 147 148 153 158 172 172 200 255 71 359 Group B was provided with one-on-one instruction on diabetes control.128 128 158 159 160 163 164 188 195 198 220 221 223 226 227 283 Compute the five number summaries for the two groups of data. Does there appear to be a difference in the distribution of fasting plasma glucose between the two groups? Justify your answer. Explain the concepts of bias and confounding in the context of this example.

Explanation / Answer

a)

A B Mean 163.2777778 Mean 190.0625 Standard Error 16.65368231 Standard Error 10.47516 Median 147.5 Median 191.5 Mode 172 Mode 128 Standard Deviation 70.65559014 Standard Deviation 41.90063 Sample Variance 4992.212418 Sample Variance 1755.663 Kurtosis 2.411888117 Kurtosis -0.00741 Skewness 1.486252825 Skewness 0.400418 Range 281 Range 155 Minimum 78 Minimum 128 Maximum 359 Maximum 283 Sum 2939 Sum 3041 Count 18 Count 16

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