Statistics and Research Methods

These flashcards cover key vocabulary and concepts related to statistics and research methodologies important for understanding experimental design and data analysis.

What is the range of scores distributed from 62 to 98?

36

What does the standard deviation (SD) represent?

The average amount of deviation of scores from the mean.

Which index of variability considers all score values?

Standard deviation

What is the most stable measure of central tendency?

Mean

Which measure of central tendency has a value of 9 for the scores 5, 6, 9, 10, 10?

The median

What index of central tendency is best for reporting age of onset for Alzheimer's disease?

The median

What is the most frequently occurring score in a distribution called?

Mode

What is the term for a distribution with two peaks, such as scores peaking at 25 and 55?

Bimodal

What is the technical name for a bell-shaped distribution?

Normal distribution

What is the likely distribution for adult height?

Normally distributed

What is ordinal measurement?

A level in which an attribute is rank ordered on a scale.

What is the level of measurement for marital status?

Nominal

What is the level of measurement for educational attainment (1 = high school, 2 = some college, etc.)?

Ordinal

What is the level of measurement for a 30-item caregiver burden scale?

Interval

What does a correlation of -0.80 indicate?

Strong negative correlation

What is the range in data?

The highest score minus the lowest score.

What is the mean of the set of numbers: 3, 3, 4, 4, 5, 6, 7, 8, 9?

5.4

What is a systematic arrangement of values from lowest to highest, with counts or percentages?

Frequency distribution

Which dataset is most homogeneous with a mean of 100?

Range of 75-105

What do correlation coefficients describe?

Direction and strength of relationships between two variables.