Operating Toilets with Foot: A Common Practice Among Adults?

Question:

What percentage of adults operate the flusher of toilets in public restrooms with their foot, and how many adults would we expect to flush toilets in public restrooms with their foot if 700 adults are randomly selected? Additionally, would it be unusual to observe 630 adults who flush toilets in public restrooms with their foot?

Answer:

(a) We would expect adults to flush toilets in public restrooms with their foot. (Type a whole number.)

Final answer: We would expect 623 adults to flush toilets with their foot out of 700 randomly selected adults. Observing 630 doing so would not be considered unusual.

Explanation:

In a survey, it was found that 89% of adults operate the flusher of toilets in public restrooms with their foot. This means that given a sample of 700 adults, we can expect approximately 623 adults to flush toilets using their foot. This calculation is done by multiplying the total number of adults in the sample (700) by the percentage that operates the flusher with their foot (89%).

To calculate the expected number of adults who flush toilets with their foot:

Total adults in sample × Percentage operating flusher with foot = Expected number of adults flushing with foot

700 adults × 0.89 = 623 adults

Therefore, we would expect 623 adults to flush toilets with their foot if 700 adults are randomly selected for the survey.

As for observing 630 adults who flush toilets with their foot, it is close to the expected number of 623 adults. In a statistical sense, this deviation from the expected value would not be considered unusual.