CHAPTER 2.9: Basic Statistics

Question 1

what are descriptive statistics?

Answer 1

set of techniques used to organize, summarize and interpret data

Question 2

what is frequency?

Answer 2

number of observations that fall within a certain category/ range of scores

Question 3

what is the difference between a positively and negatively skewed distribution?

Answer 3

positive - histogram skewed towards lower values

negative - histogram skewed towards higher values

Question 4

what is central tendency?

Answer 4

measure of the central point of a distribution (mean. median, mode)

Question 5

what is the mean of a dataset?

Answer 5

the average

Question 6

what is the median of a dataset?

Answer 6

the middle value when order sequentially

Question 7

what is the mean of a dataset?

Answer 7

the most frequent number

Question 8

what is variability?

Answer 8

the degree to which scores are dispersed (spread out) in a distribution