(Solved): Q3. UD Management wants to find out the driving time students take to reach UD from Dubai during r ...

Q3. UD Management wants to find out the driving time students take to reach UD from Dubai during rush hours. Fifteen students (n=15) were randomly sampled, with a sample mean of 35 minutes and the sample standard deviation of 5 minutes. Assuming the distribution of the driving time was normal. (Show details of your solution) a. Would you use a t-distribution or z-distribution for this problem? Explain Why. b. Construct the 95% confidence interval for the students driving time, assuming that the driving time follows a normal distribution. i.e. find the lower and upper intervals)? c. Construct the 90% confidence interval for the students driving time, assuming that the driving time follows a normal distribution, i.e. find the lower and upper intervals)?