Question
Question 1 A. The lengths of iron rods produced by a machine is assumed to have a Normal distribution with a mean of 5 cm
Question 1
A. The lengths of iron rods produced by a machine is assumed to have a Normal distribution with a mean of 5 cm and a standard deviation of 2cm. A sample of 4 rods is selected at random for inspection. What should be the probability that the mean length of the 4 rods is less than 5.2cm?
B. The lengths of iron rods produced by a machine is assumed to have a Normal distribution with a mean of 5 cm and a standard deviation of 2cm. A sample of 4 rods is selected at random for inspection. What should be the probability that the mean length of the 4 rods is less than 5.4cm?
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High School Math 2012 Common-core Algebra 2 Grade 10/11
Authors: Savvas Learning Co
Student Edition
9780133186024, 0133186024
