A marketing company is interested in determining the proportion of population that is in their 50s and higher (include 50 years of age). They want to construct a 96% confidence interval of the population proportion. Consider the sample labelled problem #2 in the Excel file sent and construct confidence interval. You will clearly indicate the (a) sample proportion, (b) the standard deviation used, and (c) the standard variable you used (z, or t or F etc.).

Age 24 43 14 56 26 58 30 50 50 51 43 22 36 27 31 25 49 16 1 43 48 51 37 50 38 Acco 35 43 15