Exam 15: Statistical Reasoning in Everyday Life

Cross-sectional research indicated that with age,mental ability ________.Longitudinal research indicated that as adults age,intelligence________.

To calculate the numerical value of the standard deviation,it would be most reasonable to first compute the value of the

Which of the following correlations between annual income and education level would best enable you to predict annual income on the basis of level of education?

Which of the following statistical measures is most helpful for indicating the extent to which people's happiness predicts the number of friends they have?

The mode of a distribution of scores is the

When people's symptoms of emotional distress are at their worst,whatever they do to try to alleviate the condition is likely to be followed by improvement rather than further deterioration.This is best explained in terms of

Which of the following is a statistical measure of the relationship between two variables?

In a distribution of test scores,which measure of central tendency would likely be the most affected by a couple of extremely high scores?

Students who score much higher on an exam than they usually do can reasonably anticipate ________ scores when they are retested.

A longitudinal study is one in which

A sample average can be used to estimate a population average with greater precision if the sample is

If the points on a scatterplot are clustered in a pattern that extends from the upper left to the lower right,this would suggest that the two variables depicted are

A cross-sectional study is one in which

If IQ scores are normally distributed,having a mean of 100 and a standard deviation of 15,approximately what percentage of people have IQ scores between 85 and 115?

For which of the following distributions of scores would the median most clearly be a more appropriate measure of central tendency than the mean?

Which of the following correlation coefficients expresses the weakest degree of relationship between two variables?

Kiska displayed the relationship between college students' self-esteem and their feelings of depression on a scatterplot.The points on the scatterplot are most likely clustered in a pattern that

A scatterplot graphically depicts the

Research in which people of different ages are compared with one another at one time is a

Akira dreamed that a handsome young man she had met the previous day asked her for a date.When he actually did call for a date several days later,Akira concluded that dreams accurately predict future events.Her belief best illustrates