Question

An automobile manufacturer claims that its van has a 36.2 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 220 vans, they found a mean MPG of 36.0. Assume the variance is known to be 4.41. A level of significance of 0.05 will be used. Make a decision to reject or fail to reject the null hypothesis Make a decision Answer Tables Keypad Keyboard Shortcuts Reject Null Hypothesis Fail to Reject Null Hypothesis

Answer 1

Answer:- Criven d-0.05 Population mean = M = 36.2 Sample size = na 220 Sample mean a X = 36.0 아른 441 variance a standard deviation no. Svariance 54.4 -2.1 The null and alternative hypothesis. Ho : M = 36.2 Ha : M & 36.2 X-M Test statistic Zo 360-36.2 olon 2:115220 =-1.41261 nosso e orgol to see the one on P-value is calculated as ? P-value 2PCZ > -1.41261) = 0.1578 P-valle 10.1578) > a Co.05) fail to reject the null hypothesis.