The direction and sign of a hypothesis test are specified inthe alternative hypo

Question

The direction and sign of a hypothesis test are specified inthe alternative hypothesis. I need to decide whether the followingalternative hypotheses (HA) are one-tailed in thepositive direction, one tailed in the negativedirection, or two-tailed nondirectional. Also I need toindicate the mathematical sign and eplain myanswer. I am very confused, I need help. a. HA:Over 50 percent of lung cancer victims are orhave been smokers. b.HA: The mean grade point average ofmale and female students is not the same. c.HA: In the central city school district less than 60 percent of high school graduates go oncollege. The direction and sign of a hypothesis test are specified inthe alternative hypothesis. I need to decide whether the followingalternative hypotheses (HA) are one-tailed in thepositive direction, one tailed in the negativedirection, or two-tailed nondirectional. Also I need toindicate the mathematical sign and eplain myanswer. I am very confused, I need help. a. HA:Over 50 percent of lung cancer victims are orhave been smokers. b.HA: The mean grade point average ofmale and female students is not the same. c.HA: In the central city school district less than 60 percent of high school graduates go oncollege.

Explanation / Answer

The direction and sign of a hypothesis test are specified inthe alternative hypothesis. I need to decide whether the followingalternative hypotheses (HA) are one-tailed in thepositive direction, one tailed in the negativedirection, or two-tailed nondirectional. Also I need toindicate the mathematical sign and eplain myanswer. I am very confused, I need help. a. HA:Over 50 percent of lung cancer victims are orhave been smokers.
one tailed in positive direction or
is the test statistic(maybe sample mean) too large
b.HA: The mean grade point average ofmale and female students is not the same.
two tailed test or
is the test statistic (maybe sample mean) too large or twosmall
c.HA: In the central city school district less than 60 percent of high school graduates go oncollege.
one tailed test in negative direction or
is sample statistic too small

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