Question

Arthrow the core more than one of perday Archives more than ondom sample of people found that of them.com Myou logers or coolmats. Do not round) Rond to the decimal places as need De who record the rulothes OAR O Donde OA There is contevidence to conclude that more than 80% of con US come more than one cup of coffee per day Thence to conclude that of people in the US consume more non pof coffee per day OC. There is evidence is conclude that more than one of people in the US or more than one cup of coffee per day OD. The video to concludes than 80% of people in the core than one of coffee per day

Answer 1

(a) Here sample proportion = p^ = x/n = 44/50 = 0.88

Null Hypothesis : H₀ : p = 0.80

Alternative Hypothesis : H_a : p > 0.80

standard error of proportion = se_p = sqrt [0.8 * 0.2/50] = 0.0566

(b) Here test statistic

z = (0.88 - 0.80)/0.0566 = 1.4142

P - value = P(Z > 1.4142) = 1 - NORMSDIST(1.4142) = 1- 0.9214= 0.0786

(c) Here as p value is greater than 0.05, so we would fail to reject the null hypothesis.

(d) There is insufficient evidence to conclude that more than 80% of people in the US consume more than one cup of coffee per day. Option C is correct here.