Birth Weights For 100 randomly selected births from Bellevue H...

Question

Birth Weights For 100 randomly selected births from Bellevue Hospital Center, the birth weights are added and then divided by 100. The result is 3240 g. Is the value of 3240 g a statistic or a parameter?

Accepted Answer

Hello, everyone. Let's take a look at this question together. At a local healthcare center, 150 patients were randomly selected and their systolic blood pressures were recorded. The mean of measured values was then calculated by adding all the values and dividing them by 150. The result is 128 millimeters of mercury. Determine whether the value of 128 millimeters of mercury is a statistic or a parameter. Is it answer choice A, a statistic, answer choice B, a parameter, answer choice C, both of these, or answer choice D, none of these? So in order to solve this question, we have to recall what we have learned about what a statistic and a parameter is to determine whether the value of 128 millimeters of mercury is a statistic, a parameter, both or neither, and we can recall that a statistic is defined as a numerical measure that describes a sample. And the parameter is defined as a numerical measure that describes an entire population. So looking at the value of 128 millimeters of mercury, we know that that value of 128 millimeters of mercury was calculated from the 150 patients, and those 150 patients were randomly selected out of the entire population of the local health. Care center. So the 150 patients are a sample of the entire hospital population, which tells us that the value of 128 millimeters of mercury is a numerical measure that describes a sample making it a statistic, and since it measures a sample and not the entire population, it cannot be a parameter, so only answer choice A is the correct answer. And all other answer choices are incorrect. I hope you found this video to be helpful. Thank you and goodbye.

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