SOLUTION: You measure 45 textbooks' weights and find they have a mean weight of 56 ounces. Assume the population standard deviation is 6.6 ounces. Based on this, construct a 95% confidence i

Question 1170284: You measure 45 textbooks' weights and find they have a mean weight of 56 ounces. Assume the population standard deviation is 6.6 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.
Give your answers as decimals, to two places

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the half-interval is z*sigma/sqrt(n)
for 95% the z is 1.96
so half-interval is 1.96*6.6/sqrt(56)=1.93 oz.
(54.07, 57.93) oz
RELATED QUESTIONS
You measure 41 textbooks' weights, and find they have a mean weight of 49 ounces. Assume... (answered by robertb)

You measure 45 textbooks' weights, and find they have a mean weight of 40 ounces. Assume... (answered by oscargut)

#1 You measure 28 textbooks' weights, and find they have a mean weight of 41 ounces.... (answered by Boreal)

You measure 47 textbooks' weights, and find they have a mean weight of 59 ounces. Assume... (answered by Boreal)

You measure 30 textbooks' weights, and find they have a mean weight of 78 ounces. Assume... (answered by math_tutor2020)

You measure 22 textbooks' weights, and find they have a mean weight of 73 ounces. Assume... (answered by ewatrrr)

You measure 42 randomly selected textbooks' weights, and find they have a mean weight of... (answered by Boreal)

You measure 49 textbooks' weights, and find they have a mean weight of 65 ounces. Assume... (answered by Boreal)

You measure 26 textbooks' weights, and find they have a mean weight of 44 ounces. Assume... (answered by Boreal)