Measurements made on the base metal are more variable

Reference no: EM131162770

Twenty-one independent measurements were taken of the hardness (on the Rockwell C scale) of HSLA-100 steel base metal, and another 21 independent measurements were made of the hardness of a weld produced on this base metal. The standard deviation of the measurements made on the base metal was 3.06, and the standard deviation of the measurements made on the weld was 1.41. Assume that the measurements are independent random samples from normal populations. Can you conclude that measurements made on the base metal are more variable than measurements made on the weld?

Reference no: EM131162770

Questions Cloud

Discuss the stages of model formulation : Discuss the stages of model formulation with respect to the aggregate model. In particular, interpret the objective function and constraints given by expressions (1) to (15).

Briefly describe the racial or ethnic group : Briefly describe the racial or ethnic group and your understanding of its communication patterns. Provide examples of the importance of multicultural communication in today's society.

Develop a public service health announcement : Develop a public service health announcement. The PSHA should: Have a clear message. Be targeted toward a specific audience. Be persuasive in nature.

Review background information on food insecurity issues : Review background information on Food Insecurity issues in the U.S. You will visit two grocery stores near you and complete the NEMS evaluation instrument on each store and then write a 1-2 page reflection on your experience.

Measurements made on the base metal are more variable : Can you conclude that measurements made on the base metal are more variable than measurements made on the weld?

Derive the production plan that minimizes total cost : Derive the production plan that minimizes total cost. Solve by both backward and forward induction. Consider x1 and x2 as continuous variables, since any fraction of a ton may be produced in either month.

How should the be allocated among the projects : How should the $35,000 be allocated among the projects to achieve the largest total reduction in completion times? Assume that the additional funds can be allocated only in blocks of $5000.

Arguments that grazian and other readings : What are the main arguments that Grazian and other readings assigned for this week make about the relationship between social class and cultural consumption? Do you think there a value-difference today between popular culture and high culture? Why..

Effect diagram showing the potential causes of falls : Draw a flow chart showing under what circumstances a patient might fall. - Construct a cause - and - effect diagram showing the potential causes of falls.

User Account

All Pages