a) Develop an appropriate Hypothesis Test at 0.05 significance level to validate Leise's claim. You may adopt either critical or p value approach with the help of outputs from Excel Data Analysis tool. However, you are required to show all the test steps. Explain the type of Hypothesis Test Error that may occur in your test conclusion, the consequence of this error, and how the occurrence of this error can be reduced. (b) EBS runs three daily shifts of buses. To plan efficient bus schedules, the Operation Manager needs to know whether there are differences in the average bus speeds among BUS105 (Online) Group-based Assignment SINGAPORE UNIVERSITY OF SOCIAL SCIENCES (SUSS) Page 9 of 9 the shifts. He collected a sample of bus speeds each from the Morning, Afternoon and Evening shift as shown in the GBA Data file (under the Bus Speed worksheet). To help the Operations Manager, apply an appropriate test at 0.10 significant level using p-value approach with the help of outputs from Excel Data Analysis tool. You must show all the test steps. (c) EBC consults you on the approach it used in Q1(b) and Q2(a). Discuss three (3) statistical concerns (excludes the issue on type of Test Error in Question 2(a)) you have regarding the way the data are collected or analysis is done. For each concern, propose a refined or different approach.