37
(Choose 1 answer)
(See picture)
A. 1019.5632 ς μ ≤ 1030.4459
Β. με 1030.4459
C. μς 1029.5694
D. 1020.4306 ≤ μ
The life of a car tire in miles is known to be normally distributed with a standard deviation of 25 miles. A random sample of 81 tires has an average life of 1025 miles. Construct a 95% lower confidence interval on the mean life.(Calculations need to be rounded to 4 decimal places.)Let z_0.025 1.96; z_0.05-1.645; z_0.005-2.575.
