If a real-world problem is correctly formulated, it is not ...

[ss2343]

If a real-world problem is correctly formulated, it is not possible to have alternative optimal solutions.
  Indicate whether the statement is true or false

Question 2

D size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of an improved production process, the company believes that there has been an INCREASE in the life expectancy of its D size batteries. A sample of 36 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 9 hours.
 a. Use a .01 level of significance, and test to determine if there has been an increase in the life expectancy of the D size batteries.
 b. What is the p-value associated with the sample results? What is your conclusion, based on the p-value?

[Qarqy]

Answer to Question 1

F

Answer to Question 2

a. H0:   87
Ha:  > 87 z = 1; therefore do not reject H0 . There is not sufficient evidence at  = .01 to conclude that there has been an increase in the life expectancy in the D size batteries.
b. p-value = 0.1587; therefore, do not reject H0 (same conclusion as part a)

[ss2343]

Thank you

[Qarqy]

No problemo