Prove that the new process has smaller variance

Assignment Help Basic Statistics

Reference no: EM13145508

A manufacturing process drills holes in sheet metal that are supposed to be .5000 cm in diameter. Before and after a new drill press is installed, the hole diameter is carefully measured (in cm) for 12 randomly chosen parts. At α = .05, do these independent random samples prove that the new process has smaller variance? Show the hypotheses, decision rule, and test statistic.

New drill: 0.5005 0.5010 0.5024 0.4988 0.4997
0.4995 0.4976 0.5042 0.5014 0.4995
0.4988 0.4992

Old drill: 0.5052 0.5053 0.4947 0.4907 0.5031
0.4923 0.5040 0.5035 0.5061 0.4956
0.5035 0.4962

Reference no: EM13145508

Questions Cloud

What is a potential cascading effect to everglades flora : What would be a potential cascading effect to the Everglades flora and fauna as a result of interspecific competition.

How much heat is required : The heat of vaporization of benzene, C6H6 , is 30.8 kJ/mol at its boiling point of 80.1 °C. How much heat is required to vaporize 128 g benzene at its boiling point ?

Find the temperature of the hcl : A student measures out 100.0 ml of 1.00 M HCl and places it in a styrofoam cup. The temperature of the HCl is 22.30C. She then addes 1.002 g of MgO to the cup.

International financial reporting standards : Which of the following is not a required segment reporting disclosure according to International Financial Reporting Standards?

Prove that the new process has smaller variance : The hole diameter is carefully measured (in cm) for 12 randomly chosen parts. At α = .05, do these independent random samples prove that the new process has smaller variance?

Estimated manufacturing overhead : The predetermined manufacturing overhead rate for 2010 was $4.00 per direct labor hour; employees were paid $5.00 per hour. If the estimated direct labor cost was $75,000, what was the estimated manufacturing overhead?

Continuing operations before income taxes : Cendant Corporation's results for the year ended December 31, 2011, include the following material items: Cendant Corporation's income from continuing operations before income taxes for 2011 is:

Compare and contrast vegetative features : You do not need to trace the development of every single root and branch, but trace the development of roots and branches to two orders of branching (i.e., a branch attached to a branch attached to the main axis and a root attached to a root attac..

What are the main problems of collecting qualitative data : Why will you choose closed-ended questions as opposed to open-ended questions and what are the main problems of collecting qualitative data

User Account

All Pages