Question

there are 50,000 adults living in oak city. in examining attitudes toward the news, a research group asked a random sample of oak city adults \what is your main source of news?\ the results are shown below.

main source of news	number of adults
internet	87
television	127
radio	28
other	41

based on the sample, predict the number of adults in oak city whose main source of news is the radio. round your answer to the nearest whole number. do not round any intermediate calculations.
adults

Explanation:

Step1: Calculate sample size

$55 + 87+127 + 28+41=338$

Step2: Set up proportion

Let $x$ be the number of adults in Oak - City whose main source of news is the radio. The proportion is $\frac{28}{338}=\frac{x}{50000}$.

Step3: Solve for $x$

Cross - multiply: $338x = 28\times50000$. Then $x=\frac{28\times50000}{338}\approx4142$.

Answer:

4142