Hi. I have a discussion for class this week. Here is what we had to do:Think of a problem that you may be interested in that deals with a comparison of two population means. Propose either a confidence interval or a hypothesis test question that compares these two means. Gather appropriate data and post your problem (without a solution) in the discussion topic.

Here is my problem:

Hi Class!

We are having an unusually hot day here in Philadelphia so it got me wondering if temperatures are hotter now than they were in 2000. I chose the week of 9/25/2000 and compared it to the week of 9/25/2019.I am comparing the mean temperature for the 5 days. I will use a 2 sample t-stat for means w,ith a significance level of .05.

Data taken from:https://www.wunderground.com/history/weekly/us/pa/philadelphia/KPHL/date/

September 2000 sample high temperatures: 77,60,55,68,69,62 and 67

September 2019 sample high temperatures: 89,91,77,80,83,79,84

I used a t-stat since the samplings are random, independent and from different years, the population is larger than the sample, and after using statcrunch no outliers.

I will post answer later.

Thank you!

I am using stat crunch and I think I am fouling myself up with the level of significance. Am I calculating this right? Am I rejecting?

I think september 2019 hotter than 2000

see screen shot attached

Southern New Hampshi StatCrunch X @ Discussion 5-1 Option 1 x Homework Help - Q&A x Home - >> Students X @ 5-1 Discussion: Applicat X + X > statcrunch.com/app/index.php? 3 X f N Untitled StatCrunch Applets Edit Data Stat Graph Help Row vari var2 var3 var4 var5 var6 var7 var8 var9 var10 vari1 var12 var13 var14 70 89 60 91 55 77 68 80 Options 69 83 6 62 79 Two sample T hypothesis test: 67 84 H1 : Mean of vari H2 : Mean of var2 H1 - H2 : Difference between two means Ho : H1 - H2 = 0 11 HA : H1 - H2