Why we use scaling
Sensory measurements involve two processes.
perception and measurement
gender or jersey numbers are what kind of data?
nominal
a line marking scale is also called a what?
visual analog scale
in magnitude estimation, what number is given to the reference sample?
10
the samples are different or the same
scaling is useful because sensory data always contains_____.
what is... variation
ranking or sizes (like small,medium, large) are what kind of data?
ordinal
a scale that goes from "weak" to "strong" is which type?
line marking scale
if a sample is half as sweet as the reference, what number should you give it?
5
a p-value below what number means a real difference?
0.05
scaling helps us generalize results to what larger group?
what is... the population
height, liking scores, and temperature are what type of data?
interval or ratio
what happens when people avoid marking the ends of a scale?
endpoint effects
number strength estimates
a t-test compares how many groups?
two
T or F: a chemical's safety depends on whether its natural
False
which type of data only uses counts?
categorical (nominal or ordinal)
category scales (like 1-9) are usually which type of data?
ordinal
the LMS scale is what type of scale?
category-ratio
what shows how spread out the data is?
standard deviation
what does scaling help us do when making decisons?
reduce risk/ make better choices
which data type can be fully analyzed with statisitcs?
continuous (interval/ratio)
name one thing you should think about when choosing a scale
does it show differences?/easy to use?/what kind of data you want
why do we need clear instructions for magnitude estimation?
people must understand how to compare numbers
if we compare 3 or more samples, what test do we use?
ANOVA