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

Approximately what percentage of the cases represented by the normal curve fall between -1 and +1 standard deviations from the mean?

Five students received the following test scores: 7,11,5,6,and 11.Calculate the mode,median,mean,and range of this distribution of scores.Which measure of central tendency would change the most if an additional test score of 2 was included in the distribution?

If a set of standardized test scores is normally distributed,having a mean of 50 and a standard deviation of 10,approximately 68 percent of the group members receive scores somewhere between

The maximum height of a normal curve corresponds to the ________ of a normal distribution.

A normal curve would approximate the distribution of

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 somewhere between 70 and 130?

To understand the British newspaper headline "Income for 62% Is Below Average," a reader needs to appreciate the distinction between the ________ and the mean.

A statistically significant difference between two sample groups is NOT likely to be

The mode,median,and mean are measures of

In a group of five individuals,two report annual incomes of $10,000,and the other three report incomes of $14,000,$15,000,and $31,000,respectively.The mode of this group's distribution of annual incomes is

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

The difference between the highest and lowest scores in a distribution is the

Faustin,a member of his school's golf team,has an opportunity to play against a nationally acclaimed professional golfer.How many holes of golf should Faustin choose to play with the professional in order to maximize his own slim chances of winning?

A normal curve would be LEAST likely to characterize a large random sample of

A random sample of females was observed to exhibit a lower average level of self-esteem than a random sample of males.To assess the likelihood that this observed difference reflects a real difference in the average self-esteem of the total population of males and females,you should

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

The range is

Mrs.Smith is measuring the height of all the children in her class and notices that the scores form a symmetrical,bell-shaped distribution.This is also known as the

Random samples provide ________ estimates of population averages if the samples have small ________.

The most frequently occurring score in a distribution of scores is the