Exam 12: Analysis of Quantitative Data

You discover that the years of marriage before a divorce for nine Whites and nine non-Whites are as follows: Whites 12, 1, 8, 9, 10, 17, 3, 6, 6 Non-Whites 1, 9, 15, 18, 11, 13, 14, 7, 3 Which statement about this data is TRUE?

Use the information in this table to answer the following questions. TYPE OF CRIME Male Female Violent 20\% 10\% Property 80\% 90\% 100\% 100\% (800) (400) -How many males were arrested for committing a violent crime?

Refer to the information provided in Table 12.3 below to answer the questions that follow. Table 12.3: Annual Family Income and Education* Statistics for Three Neighborhoods GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 14,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) *4 yrs college = 16 yrs; masters/law degrees = 18 yrs; Ph.D/MD degrees = 20 yrs. -Which neighborhood has the largest number of families with the lowest income?

How many people in the study who have more than a college degree 17+ years education) were arrested for committing a medium violent crime?

Based on Table 12.4, what type of relationship is there between degree of violence in the crime committed and level of education?

The mean is

Refer to the information provided in Table 12.3 below to answer the questions that follow. Table 12.3: Annual Family Income and Education* Statistics for Three Neighborhoods GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 14,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) *4 yrs college = 16 yrs; masters/law degrees = 18 yrs; Ph.D/MD degrees = 20 yrs. -Which neighborhood has an income distribution that is close to a normal distribution?

Refer to the information provided in Table 12.3 below to answer the questions that follow. Table 12.3: Annual Family Income and Education* Statistics for Three Neighborhoods GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 14,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) *4 yrs college = 16 yrs; masters/law degrees = 18 yrs; Ph.D/MD degrees = 20 yrs. -Which neighborhood has the greatest average variation distribution) among the incomes of families?

Discuss the concept of control as it is used in trivariate analysis. In what ways it is similar to or different from control in experiments?

Explain the difference between the three measures of variation: range, percentiles, and standard deviation.

Professor Doner asked you to interpret a Pearson product's moment correlation coefficient of .93. You say

Refer to the information provided in Table 12.1 below to answer the questions that follow. Table 12.1: 2001 survey of 1,000 randomly selected adult residents of Seattle, Years of schooling by whether or not one agrees with the statement, "Seattle should require the registration of hand guns with the city police department." Years Strongly Strongly of School Agree Agree Disagree Disagree Total () Under 8 30\% 25\% 30\% 15\% 100\% (100) 8-11 35\% 20\% 30\% 15\% 100\% (100) 12 40\% 30\% 15\% 5\% 100\% (200) 13-15 50\% 25\% 20\% 5\% 100\% (300) 16 60\% 25\% 10\% 5\% 100\% (200) 17 or more 80\% 10\% 5\% 5\% 100\% (100) -After examining the bivariate relationship between years of schooling and knowledge about politics, Dr. Bushhead controls for hair color. He finds that the relationship in partial tables is identical to the bivariate tables. In the elaboration paradigm, this is

A "codebook" is

Refer to the information provided in Table 12.1 below to answer the questions that follow. Table 12.1: 2001 survey of 1,000 randomly selected adult residents of Seattle, Years of schooling by whether or not one agrees with the statement, "Seattle should require the registration of hand guns with the city police department." Years Strongly Strongly of School Agree Agree Disagree Disagree Total () Under 8 30\% 25\% 30\% 15\% 100\% (100) 8-11 35\% 20\% 30\% 15\% 100\% (100) 12 40\% 30\% 15\% 5\% 100\% (200) 13-15 50\% 25\% 20\% 5\% 100\% (300) 16 60\% 25\% 10\% 5\% 100\% (200) 17 or more 80\% 10\% 5\% 5\% 100\% (100) -An elementary school teacher has three classes. She finds the following mean and standard deviations for student I.Q. scores. Mean Standard Deviation Class \#1 106 32 Class \#2 104 9 Class \#3 110 16 She knows she is more effective if the students are at similar ability levels and the I.Q. measures ability level in this situation. Which class is she likely to be most effective with? [NOTE: I.Q. scores for the general population range from about 70 to 130 with a mean of 100].

In reading a table someone else has constructed, the rule of thumb is

Professor Smith found a relationship between education and occupation. However, when she introduced age as a test factor, the relationship between education and occupation disappeared in the partials. This illustrates

Statistical analysis that allows scientists to confidently make accurate statements about a population is called

Describe three univariate statistics. Use a unique example to illustrate your comprehension of univariate statistics.

What does the statement, "It is statistically significant at the .10 level," mean? Is a Type I or Type II error more likely if a .05 level had been used? Explain.

Rocky Rococo found a correlation of .001 between the amount of pizza a person consumed in a year and the number of Italian phrases the person could correctly translate into English. From this, he should conclude