A random and independently chosen sample of 4 bags of horse

A random and independently chosen sample of 4 bags of horse carrots, each bag labelled 20lbs, had weights of 20.7, 19.6, 20.6 and 20 pounds. Assume the distribution of weights in the population is normal

Find the test statistic and p-value

Solution

Best Answer:  bball10

Ho: mean = 20
Ha: mean not equal 20 [2-tailed test]

mean = 20.225
s = 0.5188

t-statistic = (20.225 - 20) / (0.5188 / sqrt 4) = 0.867

p-value = 2P(t > 0.867) = 0.45 [from T-table using 3 d.f.]