Q1. Which of these hypotheses has an upper-tail Test? A. Ηρ: μ= 10 ; H: μ > 10. B. Ho: μ= 10 ; Η: μ < 10. C. Hg: μ= 10 ; H: μ > 10. D. H: μ- 10 ; Η;: μ# 10. Ο Α. Α Ο Β. Β Ο C. C Ο D. D
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- A company selling home furnaces claims that installingtheir new high efficiency furnace will “cut your heating bill in half.” A consumer agency collects data for a ran-dom sample of homes and plots this year’s heating costs with the new furnaces against previous costs with the oldfurnaces. Which are the most appropriate hypotheses totest the company’s claim?A) H0: b = 0, HA: b ≠ 0B) H0: b = 0, HA: b 7 0C) H0: b = 0, HA: b 6 0D) H0: b = 0, HA: b 6 0.5E) H0: b = 0.5, HA: b ≠ 0.5A certain university claims that for the last school year the proportion of students who were not able to earn a college diploma is at most 25%. What is the null hypothesis? a. Proportion is greater than or equal to 0.25.b. Proportion is less than or equal to 0.25.c. Proportion is equal to 0.25.d. Proportion is not equal to 0.25.The manufacturer of a certain engine treatment claims that if you add their product to your engine, it will be protected from excessive wear. An infomercial claims that a woman drove 3 hours without oil, thanks to the engine treatment. A magazine tested engines in which they added the treatment to the motor oil, ran the engines, drained the oil, and then determined the time until the engines seized. Complete parts (a) and (b) below. (a) Determine the null and alternative hypotheses that the magazine will test. UpperH0: ▼ muμ sigmaσ pp ▼ not equals≠ less than< greater than> equals= 3 Upper H1: ▼ muμ sigmaσ pp ▼ not equals≠ equals= less than< greater than> 3 (b) Both engines took exactly 17 minutes to seize. What conclusion might the magazine make based on this evidence? A. The infomercial's claim is true. The Informericial not true