# AP PSYCHOLOGY

## RESEARCH METHODS THINKING CRITICALLY WITH PSYCHOLOGICAL SCIENCE

### CORRELATION AND EXPERIMENTATION

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following represents the average score in a distribution?
 A the mode B the mean C the median D the standard deviation
Explanation:

Detailed explanation-1: -Mean: the average score, calculated by dividing the sum of scores by the number of examinees. Median: the middle raw score of the distribution; 50 percent of the obtained raw scores are higher and 50 percent are lower than the median. Variance: the average of the squared deviations of the raw scores from the mean.

Detailed explanation-2: -A variance is the average of the squared differences from the mean. To figure out the variance, calculate the difference between each point within the data set and the mean.

Detailed explanation-3: -Ideally, the mean in math (aka the average) indicates the region where most values in a distribution fall. Statisticians refer to it as the central location of a distribution. You can think of it as the tendency of data to cluster around a middle value.

Detailed explanation-4: -A mean scale score is the average performance of a group of students on an assessment. Specifically, a mean scale score is calculated by adding all individual student scores and dividing by the number of total scores. It can also be referred to as an average.

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