View the step-by-step solution to:

Question

# 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.

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.

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&amp;A x
Home - &gt;&gt; Students
X
@ 5-1 Discussion: Applicat X
+
X
&gt; 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 &lt;0
(without pooled variances)
13
14
Hypothesis test results:
Difference Sample Diff. Std. Err.
DF
15
T-Stat
P-value
16
H1 - H2
-18.857143 2.8749445 11.941555 -6.5591327 &lt;0.0001
17
18
19
20
21
22
23
24
25
26
27
28
Type here to search
O
demoaeg
6:44 PM
10/2/2019

### Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

### -

Educational Resources
• ### -

Study Documents

Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

Browse Documents