stat exam 3 (ch. 9), QMB3200 Exam 2 questions Correct 100%

In hypothesis testing, the tentative assumption about the population parameter is called - ANSWERSthe null hypothesis A fast food restaurant has automatic drink dispensers to help fill orders more quickly. When the 12 ounce button is pressed, they would like for exactly 12 ounces of beverage to be dispensed. There is, however, undoubtedly some variation in this amount. The company does not want the machine to systematically over fill or under fill the cups. Which of the following gives the correct set of hypotheses? - ANSWERSH0 : u = 12 Ha : u not = 12 The average hourly wage of computer programmers with 2 years of experience has been $21.80. Because of high demand for computer programmers, it is believed there has been a significant increase in the average wage of computer programmers. To test whether or not there has been an increase, the correct hypotheses to be tested are - ANSWERSH0 : u = 21.80 Ha : u 21.80 Which of the following null hypotheses cannot be correct? - ANSWERSH0 : u not = 10 A news reporter states that the average number of temperature in January has never dropped below 10 degrees Fahrenheit. You go online to research this claim. The appropriate hypotheses are - ANSWERSHo : u = 10 Ha : u 10 The average number of hours for a random sample of mail order pharmacists from company A was 50.1 hours last year. It is believed that changes to medical insurance have led to a reduction in the average work week. To test the validity of this belief, the hypotheses are - ANSWERSHo : u = 50.1 Ha : u 50.1 Whenever the probability of making a Type II error has not been determined and controlled, only two conclusions are possible. We either reject H0 or - ANSWERSdo not reject Ho Which of the following describe a Type II Error? - ANSWERSAccept Ho when it's false What is the probability of making a Type I error? - ANSWERSthe significance level, α Which of the following describe a Type I Error? - ANSWERSR