QUESTION A4 [5 marks! The wedding ceremony for a couple, Azlina and Hassan will be held in Pavilion Kuala Lumpur during the pandemic. A survey has been carried out to determine the proportion of guests who will come to the ceremony. From 500 invitations, only 200 of the guests agree to attend the ceremony. Find a 90% condence interval estimate for the proportion of all guests who will attend the wedding ceremony. QUESTION A5 [5 marks) From the past records, the standard deviation of the sales per retail outlet for a luxury handbag is known to be RM400, and the population of sales amounts per retail outlet is assumed to be normally distributed. Find the minimum sample size that required to estimate the mean sales per retail outlet within RM200 and with 95% condence. QUESTION A6 [5 marks! An administrator wishes to estimate the proportion of participants enrolled in tness programs who are also participants in diet programs within 0.02 and with 99% condence. Determine the minimum sample size that he should collect, if there is no basis for estimating the approximate value of the proportion before the sample is taken