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The weight gains (in grams) are given in the table below for a sample of six normal adolescent laboratory rats and for a sample of six adolescent rats that were given a high daily dose of a stimulant drug over a one-month period. Here are the weight gains for the two groups Untreated Rats 180 167 166 183 156 169 Rats given stimulants 144 150 158 138 140 163 Use technology to compute the sample standard deviations for the weight gains in each group. Give the units of these standard deviations in the second box in each answer. Control Group

math   Statistics-And-Probability   
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Answer #1

Solution:

We can use the excel to find the standard deviations for the weight gains in each group. The excel output is given below:

Untreated Rats Rats given stimulants 144 150 158 138 140 163 10.04822 180 167 166 183 156 169 ,9.90791 Standard deviation STD

Control Group S ~ 9.91   large oldsymbol{grams}

Treatment Group s 10,05 large oldsymbol{grams}

Please note the numbers are rounded to two decimal places

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