Question 14 {1 point) An advertisement claims that an automotive oil additive will increase gasoline mileage bv at least 10%. To test or confirm this claim, an auto dealer recruited 25 pairs of individuals to participate in an eight week experiment. Both individuals in each pair drove identical model vehicles with similar usage, maintenance and accident histories. A pre-participation survev assured that each driver had similar driving habits, driving records, ages, genders, etc. All fiftv cars had their oil changed just before the experiment began and one individual from each pair was randomlv selected to have the oil additive added to their car. Gas mileage was recorded for each participating automobile for the following eight weeks. The following table contains the average gas mileage for each car over the duration of the experiment. Assuming that the differences in gasoline efficiencies follow a normal distribution, test at the 10% level the null hvpothesis that the two population means are equal against the alternative that the true mean is greater for automobiles that used the oil additive. Sample Used the Oil Additive Did Not Use the Oil Additive 1 2B 25 2 1? 21 3 23 1a 4 1a 15 5 31 33 a 29 31 ? 25 2d 8 3B 44 9 36 3B 10 21 2G 11 19 23 12 32 2B 13 24 23 14 1? 19 15 18 15 16 25 2G 1? 29 22 18 1? 25 19 2B 18 2D 23 22 21 1? 1? 22 15 12 N no 19 15 14 1? 19 15 18 15 16 25 2G 1? 29 22 18 1? 25 19 28 18 2D 23 22 21 1? 1? 22 15 12 23 19 15 24 2? 24 25 21 18 The critical valuels} isiare} ________ . Determine the correct conclusion of the test. 0 1} 1.3128. Do not reject the null hvpothesis. Sufficient evidence has not been presented to conclude that the true mean is greater for automobiles using the oil additive. O 2} 1.?189 Rejectthe null hvpothesis. Sufficient evidence has not been presented to conclude that the true mean is greater for automobiles using the oil additive. O 3} 1.1848. Do not reject the null hvpothesis. Sufficient evidence has been presented to conclude that the true mean is greater for automobiles using the oil additive. O 4} 0.1240. Reject the null hvpothesis. Sufficient evidence has been presented to conclude that the true mean is greater for automobiles using the oil additive. O 5} all of the other answers {except for "none of the other answers") Q s} none of the other answers 0 ?} -1.31?8. Do not reject the null hvpothesis. Sufficient evidence has not been presented to conclude that the true mean is greater for automobiles using the oil additive