QNT 275

Need help with these questions. Thanks!

  • 1- An employer replaced its former paycheck system with

a paperless system that directly deposits payments into

employee checking or savings accounts. To verify that

proper deductions have been made, employees can

check their pay stubs online. To investigate whether

employees prefer the new system, the employer distributed

an email questionnaire that asked

Do you think that the former payroll system is not

inferior to the new paperless system?

For the CLASS:

Do you think that this question could be improved?

If not, why not?

If so, how?

Explain your answer.

  • 2- Executives of a cellular telephone company believe that 75% of iPhone users

are “very satisfied” with the device. If that’s the case, would you be surprised

if 85% of those in a survey of 225 customers say they are very satisfied?

Why or why not?

  • 3- Under what conditions would you use a t-test as opposed to a z-test? Can you use the t-table to determine the critical value of the z-test? Explain why. What are the differences between a one-tailed and a two-tailed test?
  • 4- Executives of a cellular telephone company believe that 75% of iPhone users

are “very satisfied” with the device. If that’s the case, would you be surprised

if 85% of those in a survey of 225 customers say they are very satisfied?

Why or why not?

  • 5- Managers in the human resources department suspect

that sick-day absentee rates are higher on some

weekdays than others. What test can they use to

investigate this claim?

Why do you consider that test best?

Could an alternate test be used?

Why or why not?

 
"Looking for a Similar Assignment? Order now and Get 10% Discount! Use Code "Newclient"
[promo2]