Population variance specification

Reference no: EM1311575

An automotive part must be machined to close tolerances to be acceptable to customers. Production specifications call for a maximum variance in the lengths of the parts of .0004. Suppose the sample variance for 30 parts turns out to be s² = .0005. Use α = .05 to test whether the population variance specification is being violated.

a. State the null and alternative hypotheses.

H₀: σ² =

H_a: σ² >

b. Calculate the value of the test statistic (to 2 decimals).

c. The p-value is

d. What is your conclusion?

Reference no: EM1311575

Questions Cloud

Computing percent of trucks logged or travelled : What percent of trucks logged more than 57,060 but less than 58,280 miles? What percent of Fords travelled 62,000 miles or less in the year?

Computing marginal and average product of labor : Suppose that a chair manufacturer is producing in the short run (with its existing plant and equipment). The manufacturer has observed the following levels of production corresponding to different numbers of workers:

Computation of price of the bond : Computation of price of the bond and what price should the existing bond be traded at when the new five-year bond issued

Experience the same acceleration due to gravity on earth : On a cool morning, when the temperature is 16.0 ^circC, you measure the pressure in your car tires to be 20.0 psi. After driving 30.0mi on the freeway, temperature of your tires is 51.0 ^circC.

Population variance specification : Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.

Impact of increase in production volume on sales : Impact of increase in production volume on sales, cost and income - Assuming the cost behavior patterns implied by the data in Exhibit 1 are correct, would you recommend this action be taken? What would be the impact on monthly sales, costs, and in..

Water depth decreases and the waves slow down : Find the typical speed for a tsunami. (Note down that in the open ocean, tsunamis generally have amplitude of less than a meter, allowing them to pass ships unnoticed. As they approach shore, however, water depth decreases and the waves slow down. Th..

Calculation of fc and atc : What are the FC, ATC, AFC, AVC and MC at these output levels?

Finding present value of winnings : The Caldwell Herald newspaper reported the following story - Frank Ormsby of Caldwell is the states newest millionaire. By choosing the six winning numbers on last weeks state lottery

User Account

All Pages