Question

1. Suppose a new company is interested in promoting their new diet management program. The concept is similar to weight watchers and involves an overall reduction of daily calorie intake. Before making a more direct effort at promoting the success of their program, the company wants to get an idea of how effective their program is based on a SRS. Assume the following table represents results pre and post intervention of 5 individuals varying approximately to a normal distribution.

Participant	Daily calorie count Prior to intervention	Daily calorie count After intervention
1	2456	2107
2	2789	2014
3	2694	2006
4	2984	2479
5	2654	2109

A) What type of t-test would you use here?

B) Carry out an appropriate t test investigating the effectiveness of the new weight loss intervention at reducing overall calorie intake with alpha=.05. Be sure to include each of the four steps of hypothesis testing.

Answer 1

Solution:

its paired t test

since same individuals are measured pre and post intervention

Solution-b:

conduct paired t test in excel

Install analysis tool poak in excel

Go to Data >Data Analysis>T test paired two sample for means

select avriable1 range as daily calorie count after intervention

we get

and variabe 2 range as daily calorie count after to interventio

Ho

Ha:

t=7.7319

p=0.00075

p<0.05

Reject Ho

Accept Ha

Conclusion:
There is suffcient statistical evdience at 5% level of significance to conlcude that new weight loss intervention program was effective in reducing overall calorie intake