Reference no: EM133266261

A human resources manager for a car company wanted to know whether production-line workers have more days absent than office workers. He took a random sample of eight workers from each category and recorded the number of days absent the previous year. Assume equal population variances. The manager is interested in:

1. Constructing a 95% confidence interval for the difference.
2. At 10% level of significance, whether there is a difference in days absent between the two groups of workers?

Production line	4	0	6	8	3	11	13	5
Office	9	2	7	1	4	7	9	8

Questions.

1. Determine the pooled variance. Keep to 2 decimal places.

 

2. Calculate the degrees of freedom. This is a whole number.