The director of cooperative education at a state college wants to examine the ef

Question

The director of cooperative education at a state college wants to examine the effect of cooperative education job experience on marketability in the work place. She takes a random sample of 4 students. For these 4, she finds out how many times each had a cooperative education job and how many job offers they received upon graduation. These data are presented in the table below.

Student Co-Op Jobs JOb offers
1 1 4
2 2 6
3 1 3
4 0 1

Referring to the Table above, suppose the director of cooperative education wants to obtain a 95% confidence interval estimate for the mean number of job offers received by people who have had exactly one cooperative education job. The t critical value she whould use is _________.

Explanation / Answer

The critical value we shoul use is from the T-distribution tables given in the text book, we have to take ta/2,n-1=t0.05/2,4-1 =t0.025,3 =3.182 (since fromt the tables). The crtical value is 3.182. =3.182 (since fromt the tables). The crtical value is 3.182.

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