Question

A pediatric nurse is keeping track of the weights of some of her patients. She is specifically looking at newborn patients, 0-2 months old, and late adolescent patients, 16-18 years old.

Which of the following statements best summarizes the standard deviations of these two populations?

		Late adolescent patients’ weights would have a larger standard deviation because their sizes vary more.
		Newborn patients’ weights would have the larger standard deviation because their sizes vary less.
		Newborn patients’ weights would have the larger standard deviation because their sizes vary more.
		Late adolescent patients’ weights would have the larger standard deviation because their sizes vary less.
		We are unable to determine which standard deviation is larger based on this information.
		Late adolescent patients’ weights would have the larger standard deviation because they are larger people.

Answer 1

Answer :

A pediatric nurse is keeping track of the weights of some of her patients. She is specifically looking at newborn patients, 0-2 months old, and late adolescent patients, 16-18 years old.

Which of the following statements best summarizes the standard deviations of these two populations?

We know that standard deviation of a sample is inversely proportional to the square root of (N-1), where N is the sample size. As the denominator increases, the result decreases.

Therefor the best summarizes the standard deviation of these two populations is:

We are unable to determine which standard deviation is larger based on this information.