QUESTION 22
Because of the rising costs of industrial accidents, many chemical, mining, and manufacturing firms have instituted safety courses. Employees are encouraged to take these courses designed to heighten safety awareness. A company is trying to decide which one of two courses to institute. To help make a decision eight employees take course 1 and another eight take course 2 . Each employee takes a test which is graded out of a possible 25 . The safety test results are shown below. Assume that the scores are normally distributed. Do these data provide sufficient evidence at the 5% level of significance to infer that the marks from course 1 and course 2 are different?
able[[Course 1,Course 2],[14,20],[21,18],[17,22],[14,15],[17,23],[19,21],[20,19],[16,15]]
What is the appropriate test to perform?
Paired test. H_(0):mu _(D)=0 versus H_(a):mu _(D)!=0
Paired test. H_(0):mu _(D)<0 versus H_(a):mu _(D)=0
Paired test. H_(0):mu _(D)=0 versus H_(a):mu _(D)<0
Two-sample test. H_(0):mu _(1)=mu _(2) versus H_(a):mu _(1)>mu _(2)
Two-sample test. H_(0):mu _(1)=mu _(2) versus H_(a):mu _(1)!=mu _(2)
Paired test. H_(0):mu _(D)=0 versus H_(a):mu _(D)>0
Two-sample test. H_(0):mu _(1)=mu _(2) versus H_(a):mu _(1)<mu _(2)
Two-sample test. H_(0):mu _(1)<mu _(2) versus H_(a):mu _(1)=mu _(2)n
QUESTION 22
heighten safety awareness.A company is trying to decide which one of two courses to institute. To help make a decision eight employees take course 1 and another eight take course 2.Each employee takes a test which is graded out of a possible 25.The safety test results are shown below.Assume that the scores are normally distributed.Do these data provide sufficient evidence at the 5% level of significance to infer that the marks from course 1 and course 2 are different?
Course 1 14 21 17 14 17 19 20 16
Course 2 20 18 22 15 23 21 19 15
What is the appropriate test to perform? OPaired test.Ho=0versus Ha OPaired test.Hop0versus Hap=0 OPaired test.Ho:D=0versus HaD<0 OTwo-sample test.Ho=2versus Ha:1>2 OTwo-sample test.Ho:1=2versus Ha:1#2 OPaired test.Hop=0versus Hap>0 OTwo-sample test Ho:1=2 versus Ha<2 OTwo-sample test.Ho:1<2versusHa:1=2