The 95 percent confidence interval for the mean time (in seconds) it takes students to complete this maze is: 39±1.96(8.83/√4).
<h3>Confidence interval</h3>
Using this formula
Confidence interval=Mean ± z × Standard deviation√Sample size
Where:
- xMean=39
- Z value for 95% CI=1.96
- Standard deviation=8.83
- Sample size=4
Let plug in the formula
Confidence interval=39±1.96×8.83/√4
Confidence interval=39±8.65
Inconclusion the 95 percent confidence interval for the mean time (in seconds) it takes students to complete this maze is: 39±1.96(8.83/√4).
Learn more about confidence interval here:brainly.com/question/16974109
brainly.com/question/15712887