andy is 5 kilogram less than twice his brother's. together they weigh 100 kilograms what are they weights
2 answers:
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Answer:
B. Ideally, the standard deviation would be zero because all the measurements should be the same.
Step-by-step explanation:
For this case we have the following data:
131 137 138 141 141 149
For this case the range is defined as
And for our case we have
First we need to calculate the average given by this formula:
We can calculate the sample variance with the following formula:
And if we replace we got:
And the standard deviation is just the square root of the variance so then we got:
If the subject's blood pressure remains constant and the medical students correctly apply the same measurement technique, what should be the value of the standard deviation?
For this case the variance and deviation should be 0 since we not evidence change then we not have variation. And for this case the best answer is:
B. Ideally, the standard deviation would be zero because all the measurements should be the same.