I cannot figure out these questions that I got wrong, Help.

1.Should practical significance be determined before statistical significance is determined?

2.If you read the following statistics in a research report, which group should you conclude has the greatest variability?

Group F:M= 30.23,S= 2.14

Group G:M= 25.99,S= 3.01

Group H:M= 22.43,S= 4.79

3.A recent Gallup Poll asked 4045 randomly chosen American adults to rate the ethical standards of 45 occupations. Nurses were at the top, with 73% of the poll respondents rating them very high.

If we sampled fewer Americans, the confidence interval would be? Higher or lower?

4.What is the outlier in the following set of scores?2, 31, 33, 35, 36, 38, 39

5.For describing nominal data, what is an alternative to reporting the mode?

6.For describing nominal data, what is an alternative to reporting the mode?

8.Asdf_RCincreases, what happens to the values of Cramer'sVneeded to achieve small, medium, and large effect sizes?

9.Whendf_RC= 3, what is the minimum value of Cramer'sVthat constitutes a medium effect size?

10.Charlie tests whether there are more male or female coffee drinkers at his university's coffee shop. One day, he collects data on gender from 76 customers. If the gender ratio is 55 percent female, what is the expected number of male customers if the null hypothesis is true?

1.13.A U.S. Census Bureau report on the income of Americans says, with 90% confidence, the median income of all California households in 2007 was $67,484, with a margin of error of $375. This means that:

a.

90% of all households had incomes in the range $67,484 $375.

b.

the Census Bureau got the result $67,484 $375 using a method that will cover the true median income 90% of the time when used repeatedly.

c.

90% of the households in the sample interviewed by the Census Bureau had incomes in the range $67,484 $375.

d.

the median income for all households in the country lies in the range $67,484 $375.

14.If there is no relationship between two sets of scores, what is the value of the correlation coefficient?

a.

0.10

b.

0.5

c.

0.00

d.

0.001

15.____ statistical tests are less powerful than _____ statistical tests because they work with nominal or ordinal outcomes.

a.

Nonparametric; parametric

b.

Parametric; nonparametric

c.

Parametric; robust

d.

Robust; nonparametric

16.A chi-square goodness-of-fit test cannot be used when:

a.

the dependent variable is nominal.

b.

the dependent variable is a higher-level variable but treated as numerical.

c.

the dependent variable is a higher-level variable but treated as categorical.

d.

a single-sample is being compared to a known population value.