Question

An automobile manufacturer claims that its van has a 29.1 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 200 vans, they found a mean MPG of 28.8. Assume the standard deviation is known to be 2.4. A level of significance of 0.01 will be used. Make a decision to reject or fail to reject the null hypothesis.

PS I know how to find the test statistic but can you please show me how to find the critical value? or link a t table that works? thanks

Answer 1

Thank you.