Question 1 (1 point) ) Listen Consider a situation in which a particular automobile currently has a population mean fuel efficiency of 23 miles per gallon in city driving and a known standard deviation of 5 miles per gallon in city driving. A product research group has developed a new fuel injection system designed to increase the miles per gallon in city driving. 49 new fuel injection units will be manufactured, installed in test automobiles, and subjected to city driving conditions. The alternative hypothesis claims that the new system is better than the current system. The null hypothesis is the new system is not any better than the current system. Suppose the sample mean of 28 miles per gallon in city driving is calculated as an estimate of the population mean and a level of significance of 0.05 will be used for the hypothesis test. What is the value of the test statistic? Enter your answer with 2 digits to the right of the decimal point in the box shown below. Your