Question

I believe that the average coffee drinker, drinks less than 8 cups of coffee in a 2 week period. I spoke to 50 coffee drinking co-workers and they drank between 7,10,14,3,5,10,2,14,10,12,0, 2, 10, 14, 8, 10, 13, 12,0,10, 12,14,5,6,7,8,10,13,12,2,5,7,8,9,12,14,1,3,7,9,2,14,13,12,2,7,8,9,6,1. Test the hypothesis that true mean number of cups of coffee consumed in a 2-week period for coffee drinkers is less than 8 cups per day at the 0.025 level of significance. The null H₀: μ = 8 and alternate H_A: μ < 8.

Answer 1