Question

in a survey of 3271 adults aged 57 through 85 years, it was found that 88.7% of them used at least one prescribed medication​

Answer 1

How many of the 3271 subjects used at least one prescription​ medication? Round to the nearest integer as​needed.)

Answer:

2902

Explanation:

Let the total number of adults within the mentioned age bracket be n=3271

The proportion of adults who used at least one prescription medication be p=88.7%=0.887

The point estimate of population is given by

`p=\frac {x}{n}` where x is number of individuals in the sample with the specified characteristics and n is the sample size.

Let x be the adults who used at least one prescription medication

`0.887=\frac {x}{3271}`

`x=3271*0.887=2901.377\approx 2902`