Nominal data
Named categories with no order like color, gender
Ordinal data
Data categories with order.
Likert scal
0-like
1-dont like
3- neutral….
Example of ordinal data
Type 1 error
False positive
Sometimes random chance or bad techniques
Type 2 error
False negative
Sometimes caused by small sample size
Hawthorne effect
Subjects act differently when watched
68-95-99.7 rule
In bell shaped curve:
68% within 1 SD of the mean
95% within 2 SD of the mean
99.7% within 3 SD of the mean
Neon pink milk
Bacteria serratia marcescens
What contrast is not safe for MRI?
Mangafodopir
How much caffeine available to baby
Less than 2%