Exam 3: Research Strategies: How Psychologists Ask and Answer Questions

The percentage of students whose average grades fall into various performance levels could be represented by a

The standard deviation is the square root of the average squared deviation of scores from the

Variation is to central tendency as range is to

Which of the following is a measure of the degree of variation among a set of scores?

The mean of a distribution of scores is the

The mode,median,and mean are most likely to have different values when they

Although Dominick's psychology class is sometimes longer or shorter than usual,on average each class is 50 minutes.If the lengths of these classes form a normal curve,which statistic would enable Dominick to estimate the probability that any single class will last somewhere between 47 and 53 minutes?

Which measure of central tendency is used to calculate the average of your school grades?

The average scores of two samples taken from the same population are most likely to differ if

The standard deviation is a measure of

Approximately 68 percent of the cases represented by the normal curve fall within ________ standard deviation(s)from the mean.

Six different students spent $10,$13,$2,$12,$13,and $4,respectively,on entertainment.The mode of this group's entertainment expenditures is

In a single day,45 babies were born in hospital X,65 babies in hospital Y,and 25 babies in hospital Z.At which hospital is there the greatest probability that more than 60 percent of the babies are of the same sex?

The arithmetic average of a distribution of scores is the

Which of the following events is the most probable?

One person in a 10-person group is 10 times older than anyone else in the group.With respect to age,it is most likely that the majority of group members are younger than the group's

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

Seven members of a Girl Scout troop report the following individual earnings from their sale of candy: $4,$1,$7,$6,$8,$2,and $7.In this distribution of individual earnings

Central tendency is to variation as ________ is to ________.

The average price for different brands of toothpaste could be visually displayed in a(n)