Question

ccu - rating has just released its webcast report for last month. the report details the aggregate tuning hours (aths) for the top 20 radio stations broadcast over the web. (the ath for a station is the sum total of all hours that listeners tuned to the station.) the report displays the following histogram. based on the histogram, find the proportion of aths in the sample that are greater than or equal to 1000 thousand hours. write your answer as a decimal, and do not round your answer.

Explanation:

Step1: Calculate total number of stations

The total number of stations is the sum of the frequencies in all intervals. So, $4 + 3+4 + 7+2=20$.

Step2: Calculate number of stations with ATHs $\geq$ 1000 thousand hours

The number of stations with ATHs $\geq$ 1000 thousand hours is 2.

Step3: Calculate the proportion

The proportion is the number of stations with ATHs $\geq$ 1000 thousand hours divided by the total number of stations. So, the proportion $=\frac{2}{20}=0.1$.

Answer:

0.1