& Account Overview - Acc X Gradebook X zy Section 6.2 - ONT/275T X course hero log in - Sea X Course Hero * by nals login - Search X Members Login | Natior x + X C n & https://learn.zybooks.com/zybook/QNT_275T_55318202/chapter/6/section/2?content_resource_id=42551286 G Bookmarks b Suggested Sites Imported From IE eCampus: Login N Netflix ( 18"(3 )Imported From IE (2) [ New Tab G Google R* Getsmarter.com -... Imported From IE (3) Raymour and Flani. > | Other favorites =zyBooks My library > QNT/275T: Statistics for Decision Making home > 6.2: Hypothesis test for a population mean zyBooks catalog ? Help/FAQ @ Bill Mccarthy A rods manufacturer makes rods with a length that is supposed to be 12 inches. A quality control technician sampled 40 rods and found that the sample mean length was 12.07 inches and the sample standard deviation was 0.23 inches. The technician claims that the mean rod length is more than 12 inches. What type of hypothesis test should be performed? Select Select What is the test statistic? Ex: 0.123 Left-tailed t-test Two-tailed t-test What is the number of degrees of freedom? Ex: 20 Right-tailed z-test Right-tailed t-test Does sufficient evidence exist at the o = 0.05 significance level to support the technician's claim? Select v 4 Check Next Feedback? Instructor note: z-distribution table and t-distribution tables are available for your use in Ch 7 of this zyBook. Navigate to 7.1 and 7.2 to review. How was this section? 1 1 Provide feedback 1:07 PM 2/14/2022 8