( BUS 310: business analytics) please help me answer this question step by step and what would be the correct answer please)

Select and perfarm the correct test from the following Ist in order to answer this question. - Cne sample r test - Paired samples rtest - independent samples t test For independent samples i test you can assume that group wariances are equal. Use 5W level of significance and two-tails for each hypochesis test unless clearly stared etherwise. project. Test the hypothesis that the actual ple length is significancly different from 30 feet in the population. What is the conclusion for this fest? ab fiet foot Sinoe the oerienved valuo of the test stafistic is smaler than the citical value, we repect the null trpotheses and conckude that the mean actial pile length is significantly afferent fricen 30 (net tos 10 feet Select and perform the correct tes from the following list in order to answer this question, - One sample t test - Paired samples t test - Indopendent samples ttest For independent samples t test you can assume that group variances are equal Use 5% sevel of significance and two-tails for each hypothesis test uniess clearly stated otherwee Use Cars data file for this problem. The unit of analysis in this sample is an individual car. The table included in the data file provides fuel efficiency (miles per galloril of 30 cars. before and after engine overhaul. Test the hypothesis that there is no sign ficant mean difference in fuel efficiency before and atter engine haul (use 5% level of significancel. What is the condusion for this test? Since the p value for this test is greaser than the level of significance, we reject the nut typothesis and conclude that there is a significant mean difference in fuel efficency before and ubai engine hout afer engine hitul Svice the p vilios for this test is smather than the level of significance, we repoct the mull typothesis and conclude that there is a signdicant mean difforence in fuel efficioncy befice anit afty angone haut Since the D walue fic this test is smaler than the ievel of sonuficance, wo tejoct the nul fypothess and conclute that there is a significand mean sfference in car veight bufore are affir cegrat hatef iflor congine haik