Exam 8: Analyzing Quantitative Data

When the median is the measure of central tendency,the _____ is the most appropriate and informative measure of dispersion.

An exam was given to two sections of the same course.In Section 1,the exam mean was 51 and the standard deviation was 7.In Section 2,the exam mean was 51 and the standard deviation was 13.Which of the following conclusions is accurate?

Three of the following factors are associated with a relatively small standard error of the mean.Which one is NOT?

Marialexa conducts an economic study and asks her participants to provide information about their family incomes.First,they are asked to check one box from a list of three,indicating whether they consider themselves low-income,middle-income,or high-income.She refers to this as the self-identification variable.Then,they are asked (if they are willing)to provide their annual income in dollars.She refers to this as the dollar-figure variable.The study is both confidential and anonymous,and most people answer both questions.Which of the following statements accurately describes Marialexa's dependent variables?

Seamus has determined that there is a 95% chance that the number of people visiting the Blarney Stone in the month of June will be between 1,760 and 2,025.This is:

Researchers do not want to make a Type II error,because if their study has an effect,they want to be able to find it.Thus,they make their studies as powerful as they can.Of the following,the best way to increase the power of a study is to:

Statistical hypothesis testing involves testing the:

Frank Fitness found a correlation coefficient of -.74 between hours of strenuous exercise each week and a standard measure of body mass.He interprets this to mean that there is a:

How are inferential statistics different from descriptive statistics?

Characteristics of samples are known as:

Here is a set of scores: 5,3,7,3,6,2,5,3.The mode of this set of scores is:

Characteristics of populations are known as:

Here is a set of scores: 5,3,7,3,6,2,5,3.The median of this set of scores is:

On the basis of statistical findings,Becky determines that the difference between males and females on a test of abstract mathematical reasoning is merely due to chance.If,in fact,there are gender differences in the population,Becky will have made a:

Here is a set of scores: 5,3,7,3,6,2,5,3.The mean of this set of scores is:

The measure(s)of central tendency that is/are appropriate for use with nominal data is/are:

The z-score,or standard score,allows the research to determine:

The percentile rank allows the researcher to determine:

When summarizing ordinal data,the most useful measure of central tendency is the:

On the basis of statistical findings,Ron determines that the differences between males and females on a test of spatial reasoning are not due merely to chance.If,in fact,there are no gender differences in the population,Ron will have made a: