T1: Stats and Ethics

Question 1

statistics in psych

Answer 1

used to determine the significance of relationships between variables.

Question 2

descriptive stats

Answer 2

involves techniques for describing data. for example, frequency distribution, measures of central tendency, measures of variance

Question 3

inferential stats

Answer 3

used to make predictions or inferences from data. for example, t-test, chi square, ANOVA, etc.

Question 4

frequency distributions

Answer 4

putting scores in order adds meaning–bar graphs are visual representations of frequency distributions. or curves.

Question 5

normal distribution

Answer 5

symmetrical with highest frequency in the middle. peak of curve is mean median and mode.

Question 6

positively skewed

Answer 6

contains extreme high scores with low frequency. mode in middle, then median, then mean.

Question 7

negatively skewed

Answer 7

contains extreme low scores with low frequency. mean lowest, then median, then mode in middle.

Question 8

mean

Answer 8

most sensitive to a skew. average.

Question 9

median

Answer 9

middle number. use on skewed graphs to represent data most accurately.

Question 10

mode

Answer 10

most frequent number

Question 11

range

Answer 11

the spread between the highest and lowest number. Ex: 50 (low) - 100 (high). range is 50.

Question 12

standard deviation

Answer 12

measure of how much scores vary around the mean.
68% within 1 SD,
95% within 2 SDs,
99.7% within 3 SDs.

Question 13

human participants ethics

Answer 13

-confidentiality must be guaranteed,
-participation must be voluntary,
-must give informed consent,
-debriefed after experiment.

Question 14

informed consent

Answer 14

need to know what will be expected of them, hypothesis does not need to be revealed. (misdirect, general gist)