variables and measurments

Question 1

what are clinical studies?

Answer 1

uses sample of patients to make conclusions on population

Question 2

what are laboratory experiments?

Answer 2

uses data to make inferences on population

Question 3

whats the aim of data analysis?

Answer 3

make the strongest conclusions possible from limited data

Question 4

how are statistics used in data analysis?

Answer 4

extrapolate data from sample to make conclusions on population

Question 5

how are confidence intervals used in data analysis?

Answer 5

make general conclusions on wider population

Question 6

what is a population?

Answer 6

a finite or infinite collection of inderviduals whose properties are analysed

Question 7

what is a sample?

Answer 7

a subset of a population

Question 8

what is sampling error?

Answer 8

by chance may have a higher or lower mean than population

Question 9

what is selection bias?

Answer 9

data thats not randomly collected

Question 10

what is bias?

Answer 10

experimental methodology resulting in higher or lower mean than population

Question 11

what is X̄?

Answer 11

mean sample

Question 12

what is μ?

Answer 12

mean population

Question 13

what is the symbol of standard deviation sample?

Answer 13

s

Question 14

what is the symbol of standard deviation of population?

Answer 14

σ

Question 15

what is a good sample?

Answer 15

representative of entire population and gives each data point an equal chance of being chosen