Frequency Distributions

Question 1

normal distribution

Answer 1

bell-shaped curve

Question 2

skewed distribution

Answer 2

asymmetrical; one end tail is pulled away from the center

Question 3

What effect is linked to a positively skewed curve?

Answer 3

floor effect

Question 4

What effect is linked to a negatively skewed curve?

Answer 4

ceiling effect

Question 5

Dot plot

Answer 5

signals individual values and allows visualization of the overall shape of the data. does not have a y-axis.

Question 6

Frequency tables

Answer 6

two columns: one with possible values and the other with the frequency of each value.

Question 7

Grouped frequency tables

Answer 7

same structure as a frequency table, but the possible values are grouped in ranges.

Question 8

2 ways “interval” is used

Answer 8

for interval variable; for intervals of values in a grouped frequency table.

Question 9

the equation to convert values to percentage

Answer 9

frequency divided by the total number of possible values (categories), then multiply by 100.

Question 10

histogram

Question 11

Pareto chart