Exam 81: Understanding Descriptive and Inferential Statistics for Psychological Research

There are 10 students in the pre-kindergarten class.Each student is shown eight colors and asked to name them.The number of colors correctly named by each student is: 8,8,8,8,7,7,6,6,5,4.What would be the median?

An effective way to make sure that a sample is representative is to use random selection.

Histograms and frequency polygons are visual representations of

Smaller cross-sections that are used to draw conclusions about the entire population are called

On a graph,the vertical line or Y axis is called

Behavioral variables found in the population often form a normal curve,which is described as which type of distribution?

If you add up all the scores and then divide by the number of scores,you arrive at the

There are ten students in the pre-kindergarten class.Each student is shown eight colors and asked to name them.The number of colors correctly named by each student was: 8,8,8,8,7,7,6,6,5,4.What would be the mean?

Gabe had a score of 70 in a class with a mean of 80 and a standard deviation of 10.His z-score is

As the correlation coefficient gets closer to +1.00 or -1.00,then the relationship will be

Regarding correlations,which of the following statements is FALSE?

Leesa arranges her set of scores from the highest to the lowest and then selects the score that falls in the middle.Leesa has determined which measure?

The propensity for a majority of scores to fall in the midrange of possible values is referred to as

In order for Jabar to calculate a standard score,he will need which two statistics?

The 25 students in the psychology class take a 20-point quiz.Five of the students each obtained a score of 10 on the quiz,10 students each obtained a score of 15,and 10 students each obtained a perfect scores of 20.What would be the mean of these scores?

Which measure of central tendency indicates the most frequently occurring score in a distribution?

In order to convert a number to a z-score,it is necessary within a group of scores to know the standard deviation and the __________.

Ten music majors take a 20-point quiz on the musical scales.Their scores are as follows: 12,13,15,15,16,16,17,18,19,20.The median of these scores is 16.

A particular advantage of the standard deviation is that it

Correlations allow us to