there were 324 adults surveyed. among the participants, the mean number of hours of sleep each night was 7.5…

there were 324 adults surveyed. among the participants, the mean number of hours of sleep each night was 7.5 and the standard deviation was 1.6. the margin of error, assuming a 95% confidence level, is approximately 0.17. round to the nearest hundredth complete the confidence interval is to done

there were 324 adults surveyed. among the participants, the mean number of hours of sleep each night was 7.5 and the standard deviation was 1.6. the margin of error, assuming a 95% confidence level, is approximately 0.17. round to the nearest hundredth complete the confidence interval is to done

Answer

Answer:

7.33 to 7.67

Explanation:

Step1: Recall confidence - interval formula

$\bar{x}\pm E$, where $\bar{x}$ is the sample mean and $E$ is the margin of error.

Step2: Identify given values

$\bar{x}=7.5$, $E = 0.17$ (from previous part).

Step3: Calculate lower - bound

$7.5−0.17=7.33$

Step4: Calculate upper - bound

$7.5 + 0.17=7.67$