You are the manager of a restaurant that delivers pizza to customers You have just changed your delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 26 minutes From past experience you can assume that the population standard devration is 6 minutes A sample of 36 orders using the new delivery process yields a sample mean of 23.9? minutes. Complete parts {a} to (d) below. Click here to View mge 1 of the cumulative standardised normal distribution table. Click here to View p_age 2 of the cumulative standardised normal distribution table. a. Using the critical value approach. at the 0.05 level of significance. is there eVidence that the mean delivery time has been reduced below the previous population mean value of 26 minutes? Let p be the population mean. State the null hypothesis HU' and the alternative hypothesis. H1. fr A. H01p:26 B. H0: \":26 H1. p226 H1:p>26 fr C. HO: pi 26 D. H041226 H1. p=26 H1:p