1) A researcher will be using a one-tailed test. Specify the null and alternative hypothesis:The national average on a test of aggressiveness is 50. A researcher wishes to determine whether, for individuals who have participated in aggression-reducing exercises, the average is less than 50

2) A researcher will be using a one-tailed test. Specify the null and alternative hypothesis:The average attendance at Sunday church services in the United States is 180 people per congregation. An investigator wants to determine whether the average attendance in a particular community is greater than 180.

3)You are concerned with how well college-educated women in Wisconsin cope with divorce. Youhave reason to believe that they cope better than the general population. You sample 100 femalecollege-educated Wisconsin residents who were divorced in the past six months and you havethem take the Coping With Divorce survey. The CWD has a population mean of 48 and apopulation standard deviation of 12. High scores on the CWD indicate coping well whereas lowscores on the CWD indicate coping poorly. The CWD mean of your sample comes out to be 50.Carry out a directional test with alpha equal to .05.

What is the correct form of the null &alternative hypothesis?

4)You are concerned with how well college-educated women in Wisconsin cope with divorce. Youhave reason to believe that they cope better than the general population. You sample 100 femalecollege-educated Wisconsin residents who were divorced in the past six months and you havethem take the Coping With Divorce survey. The CWD has a population mean of 48 and apopulation standard deviation of 12. High scores on the CWD indicate coping well whereas lowscores on the CWD indicate coping poorly. The CWD mean of your sample comes out to be 50.Carry out a directional test with alpha equal to .05.

(1) What is the z critical value that will be used in the decision rule?

(2)Calculate z.

5)You are concerned with how well college-educated women in Wisconsin cope with divorce. Youhave reason to believe that they cope better than the general population. You sample 100 femalecollege-educated Wisconsin residents who were divorced in the past six months and you havethem take the Coping With Divorce survey. The CWD has a population mean of 48 and apopulation standard deviation of 12. High scores on the CWD indicate coping well whereas lowscores on the CWD indicate coping poorly. The CWD mean of your sample comes out to be 50.Carry out a directional test with alpha equal to .05.

(1) What statistical decision should be made?Reject H0 orRetain H0

(2)On the basis of the results, would you conclude that college-educated Wisconsin females are different from the general population with respect to coping with divorce?

6)1. Compute the estimated standard error of the mean for the following situations.a.

(1) s = 10, n = 25

(2) s = 48, n = 100

7)Calculate the (1) mean, (2) standard deviation, and (3) standard error of the mean for the following data which represent average number of paid vacation days given in a year to employees from 12 different countries: You need to write down those statistics on your note for the following questions.

CountryDaysItaly42France37Germany35Austria35Brazil34Australia28United Kingdom28Canada26Korea25Japan25Belgium20United States13

8)Use the data inpreviousquestiontotest the hypothesis that the population mean number of vacation days in the industrialized countries of the world is equal to 25. Set alpha equal to .05 for a two-tailed test.

(1)Null hypothesis

(2)Alternative hypothesis

FYI: Table you saw in the previous question

CountryDaysItaly42France37Germany35Austria35Brazil34Australia28United Kingdom28Canada26Korea25Japan25Belgium20United States13

9)Use the data inpreviousquestiontotest the hypothesis that the population mean number of vacation days in the industrialized countries of the world is equal to 25. Set alpha equal to .05 for a two-tailed test.

(1)Calculatedf?

(2) Use Table B to find the criticaltvalues

FYI: Table you saw in the previous question

CountryDaysItaly42France37Germany35Austria35Brazil34Australia28United Kingdom28Canada26Korea25Japan25Belgium20United States13

10)

1. Use the data inpreviousquestiontotest the hypothesis that the population mean number of vacation days in the industrialized countries of the world is equal to 25. Set alpha equal to .05 for a two-tailed test.
2. (1) Calculate observedt.
3. (2) Present the statistical decision.
4. FYI: Table you saw in the previous question
5. CountryDaysItaly42France37Germany35Austria35Brazil34Australia28United Kingdom28Canada26Korea25Japan25Belgium20United States13

11)QUESTION 40

1. Use the data inpreviousquestiontotest the hypothesis that the population mean number of vacation days in the industrialized countries of the world is equal to 25. Set alpha equal to .05 for a two-tailed test.
2. Present a summary statement in the context of the research situation.
3. FYI: Table you saw in the previous question
4. CountryDaysItaly42France37Germany35Austria35Brazil34Australia28United Kingdom28Canada26Korea25Japan25Belgium20United States13