Question

a group of people were surveyed and asked how many days they exercised in the month of april. the results are shown in the histogram above. which statement is true? a) 3% responded that they only exercised 1 - 5 days in april. b) more than half responded that they exercise 11 - 20 days in april. c) the fewest number of days that someone exercised was one. d) 55% responded that they exercised more than half the days of april.

Explanation:

Step1: Analyze Option A

The vertical axis is not labeled as percentage. So, we can't say 3% exercised 1 - 5 days.

Step2: Analyze Option B

We don't know the total number of people. Just by looking at the height of bars (assuming height is frequency), we can't say more than half exercised 11 - 20 days.

Step3: Analyze Option C

The class interval is 1 - 5. We don't know if it's 1 day or any day from 1 - 5.

Step4: Analyze Option D

April has 30 days. More than half is more than 15 days. The intervals 16 - 20, 21 - 25, 26 - 30. If we assume the sum of frequencies of these intervals (by looking at the bar heights) is 55% (if we consider the total frequency as 100% - since it's a relative comparison in a histogram - and by visual - sum of the relevant bars' proportion).

Answer:

D. 55% responded that they exercised more than half the days of April.