week 5 - binomial tests Flashcards
1
Q
what is a one sample t-test
A
2
Q
why do you use a binomial test
A
- compares a sample proportion to a known value
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3
Q
what are the assumptions of the binomial test
A
- the outcome is dichotomous - there are only two possible outcomes
- the outcome can be specified as success or failure
- sometimes it is less obvious
- sometimes it is counterinitiative
- each trial is independent
- the probability of success remains the same on every trial
4
Q
how do you conduct a binomial test in R
A
- binom.test()
5
Q
how do you interpret the p-value
A
- p ≤ .05 = the observed proportion differs significantly from the known value
- p > .05 = the observed proportion does not differ significantly from the known value
6
Q
what is the direction of the effect
A
- is the probability of success higher or lower than the known value
7
Q
what does the 95% confidence tell us
A
- if we repeat the sampling method many many times and computes a 95% confidence interval, 95% of the intervals would contain the true value in the population
