Question

Two types of flares are tested and their burning times (in minutes) are recorded. The summary statistics are given below. Use a 0.05 significance level to test the claim that the two samples are from populations with the same mean. Identify the null and alternative hypotheses.

Brand X: ??=??.?, ??=?? , ?=?.?

Brand Y: ??=??.? ??=?? , ?=?.?

My problem is that I forget how to find and calculate such as TA/2 which I supposed to do next steps for E.  So, I know the question is for ??−??−?<??−??<??−??+?. I finished calculator to find T formulas. the T is 16.025. I am stuck with my step for solution.

Answer 1

کل = solution. Given. ži = 19.4 ni=35 Si=114 d = o.os we want to rest Hos el cuz A2 = 40 S2 = 0-8 i u v's tem Hail, Illa | - Test-statistic. to- xi-x2 - - vnith S, 2 ² 19.4-15-1 14.4² + (0-8) ² V35 40 - 16.0268 - to 4:3 0.2683 p-value=0.0000 aan hom et-table Ap-value <oog Hence we reject Ho at sl. loc. - There is insufficient evidence to support the claim that the two samples ose bom pop Wations with the same mean. Now toor 1-2) 1. confidence in tearcall for elk is

(x-x + tan nito ang hot >(43+ tower, is van der Spielt) na a = (4.3 + 1.993 (0.2683)) (4.3 1 0.5347) =) (3-1653 4.8347) - 95% confidence of interval for url is 1 (3-7653 , 4-8347) 1. hom above we reject Ho because the 95% confidence in hegral does not contain zero