Adesign engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. he knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. on three recent production batches, he tested service life on random samples of four headlamps, with these results:
what is the standard deviation of the sampling distribution of sample means for whenever service life is in control?
select one:
a. 10 hours
b. 6.67 hours
c. 11.55 hours
d. 5 hours
e. 20 hours

When consumers discard their gasoline-powered automobiles for electric-powered ones, this partially reflects the of gasoline?

Responsible for setting the goals and planning for the future as well as leading and controlling the work of others. out the decisions of top management. often responsible for various departments such as the production, marketing, and accounting departments. process or function of planning organizing leading and controlling. the resources arranged in an orderly and functional way to accomplish goals and objectives. the company on track and making sure goals are met. for the daily operations of a business. examples of this are supervisors, office managers, and crew leaders. act or process of creating goals and objectives as well as the strategies to meet them. for the daily operations of a business. examples of this are supervisors, office managers, and crew leaders. how the firm is structured and who is in charge of whom. direction and vision

On analyzing her company’s goods transport route, simone found that they could reduce transport costs by a quarter if they merged different transport routes. what role (job) does simone play at her company? simone is at her company.