An automobile manufacturer has given its car a
50.4
miles/gallon (MPG) rating. An independent testing firm has been
contracted to test the actual MPG for this car since it is believed
that the car has an incorrect manufacturer’s MPG rating. After
testing
140
cars, they found a mean MPG of
50.2
. Assume the population variance is known to be
4.84
. A level of significance of
0.02
will be used. Find the value of the test statistic. Round your
answer to two decimal places.
