darrell surveys 200 smartphone users on whether they use text messaging. based on the survey, he estimates…

darrell surveys 200 smartphone users on whether they use text messaging. based on the survey, he estimates the percentage of smartphone users who use text messaging is 97%, with a margin of error of ±2.5%. enter numbers to complete the statement based on darrell’s survey. if darrell’s school has 1000 students, then he can expect the percentage of smartphone users who use text messaging to be between % and %.

darrell surveys 200 smartphone users on whether they use text messaging. based on the survey, he estimates the percentage of smartphone users who use text messaging is 97%, with a margin of error of ±2.5%. enter numbers to complete the statement based on darrell’s survey. if darrell’s school has 1000 students, then he can expect the percentage of smartphone users who use text messaging to be between % and %.

Answer

Explanation:

Step1: Calculate lower - bound percentage

Subtract the margin of error from the estimated percentage. $97% - 2.5%=94.5%$

Step2: Calculate upper - bound percentage

Add the margin of error to the estimated percentage. $97%+ 2.5% = 99.5%$

Answer:

$94.5$, $99.5$