Exam 11: Analyzing Quantitative Data

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

A distribution of scores that is positively skewed will have a small number of scores that

How are inferential statistics different from descriptive statistics?

Characteristics of samples are known as:

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:

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

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 the data Marialexa collects?

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:

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

Note several steps researchers can take to optimize the power of their statistical tests.

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?

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:

A medical researcher is concerned about mistakenly concluding that a new medication is effective when it really is not.What type of error is the researcher concerned about making (Type I or Type II)? Describe what the researcher might do to decrease the likelihood of making that type of error.Discuss ramifications of your suggested approach for other types of error in the study.

Danzell is a purchasing agent for a major grocery store chain.He has noticed over the years that the higher the outdoor temperature,the more likely people are to buy fresh fruit.Based on Danzell's observations,we would say the correlation between outdoor temperature and buying of fresh fruit is:

When reporting growth data,the most useful measure of central tendency is the:

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

In a normal distribution,approximately what percentage of scores falls between one standard deviation below the mean and one standard deviation above the mean?

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