The XYX recruiting firm offers its services to recruit the best managers either from inside or outside the company. In the business world, some people
The XYX recruiting firm offers its services to recruit the best managers either from inside or outside the company. In the business world, some people claim that the managers hired from outside of the company obtain better Performances than the ones recruited from within the company.
A team of researchers asked 150 managers, chosen at random, to take part in a small study in order to verify this business world's claim. The sample was obtained using a simple random draw. The photos attached are the data collected for each of the 150 managers.
Although many people from the business world claim that the managers recruited from outside the company obtain better performances, we want to verify the proportion of managers recruited from outside the company is lower than 50%.
a) Precisely formulate the hypotheses H0 and HA that we want to confront in this problem.
b) In the sample, what is the proportion of managers recruited from outside the company? conclusion at the ?? = 5% level?
c) Obtain the 95% confidence interval for the proportion of the recruited from outside the Obtain the p-value corresponding to your hypotheses formulated in a) and give your company and briefly give the interpretation of this interval.
