Question

In a survey of 6400 people, 90% said that they make purchasing decisions based on the effect that it will have on the environment. The margin of error is ±1.3%. Name ONE value besides 90% that is included in the interval in which the overall percentage of favorable responses is likely to lie. Explain how you determined your answer.

Answer 1

termined your answer.

One value besides 90% that is included in the interval in which the overall percentage of favorable responses is likely to lie is 88.7%.

To determine this value, we need to subtract the margin of error from the percentage of favorable responses and also add the margin of error to the percentage of favorable responses.

Subtracting 1.3% from 90%, we get:

90% - 1.3% = 88.7%

Adding 1.3% to 90%, we get:

90% + 1.3% = 91.3%

Therefore, the interval in which the overall percentage of favorable responses is likely to lie is 88.7% to 91.3%.