Exam Name ULTIPLE CHOICE. Choose the one altermative that best completes the sta

Question

Exam Name ULTIPLE CHOICE. Choose the one altermative that best completes the statement or answers the question 1) A fleet of rental cars - all the same make, model, and year- has a mean fuel efficiency of 1) 23.9 miles per gallon (mpg). A random sample of 54 cars are selected and the air filter of each is replaced with a new one. Let u be the population mean fuel efficiency score that would occur if every car's air filter were replaced. The air filter change is deemed effective ifp> 23.9 mpg. A test is made of Ho' ?-23.9 versus Hi: ? > 23.9. Consider these possible conclusions: i). The air filter changes are effective. ii). The air filter changes are not effective. ii). The air filter changes might not be effective Which of the three conclusions is best if Ho is not rejected? A) ??? B) ?? C) i 2) A recent study of business travelers claims they spend an average of $41.00 per day on 2) meals. As a test of this claim, a random sampling of 16 business travelers found they had spent an average of $45.00 per day with a standard deviation of $3.65. What are the critical values for a two-tailed t test of this claim with a -0.05? A) +2.131 B) +1.746 C)+1.753 D) +2.120 3) The following MINITAB output presents a 95% confidence interval. 3) he assumed sigma-9.5996 Variable N Mean SE Mean 95% CI x 35 44.264 1.6226 (41.084, 47.444) Fill in the blanks: We are confident that the population mean is between and B) 5%, 41.084, 47.444 D) 95%, 0, 44.264 C) 95%, 41.084, 47.444

Explanation / Answer

type 2 will follow as

not rejecting h0 means that we conclude h0 is true which is when air condition is not effective.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.