According to a computer review, the average period of recovery of purchases is unknown.
According to a director of a major professional association in project management, the average number of years of project management experience with Project management would likely be greater than 6 years.
We want to verify this statement with members of the PMI (Project Management Institute).
A survey of a random sample of 24 management practitioners from project leads to the following data:
Nombre d'années d'expérience
8
8
6
5
4
8
5
8
5
6
8
7
7
5
6
7
7
8
6
5
7
7
8
5
The statistical treatment (with Excel) gives the following information:
Standard deviation of sample: 1.2854
a) Specify the statistical assumptions that would be appropriate based on the claim that was made.
b) What is the average number of years of experience obtained for this sample?
c) What is the observed value of the Student T?
d) Specify the decision rule to be adopted at the 5% significance threshold.
e) Is the Director's assertion favored at the chosen significance threshold?
