Question

When polled via random call phone drive, 3 out of 30 people stated they still felt safe in their city. If the phone drive reaches 80 people tomorrow, how many would you expect to say that they also do not feel safe in their city?

Answer 1

To estimate how many people would not feel safe in their city when the phone drive reaches 80 people tomorrow, you can use the proportion of people who currently feel safe.

Currently, 3 out of 30 people feel safe, which can be expressed as a proportion:

3/30 = 1/10

So, 1/10 of the current sample feels safe.

Now, if you expect the same proportion of people to feel safe tomorrow when you poll 80 people, you can calculate the number of people who do not feel safe as follows:

Number of people who do not feel safe = Total number of people - Number of people who feel safe

Number of people who do not feel safe = 80 - (1/10) * 80

Number of people who do not feel safe = 80 - 8

Number of people who do not feel safe = 72

So, you would expect 72 people to say that they do not feel safe in their city when you poll 80 people tomorrow, assuming the proportion remains the same.

Explanation: