Confidence Interval
CI = mean +/- test statistic(standard error of statistic)
What is the formula to find a confidence interval?
𝞪 (alpha)
What represents the significance level?
Null hypothesis is true.
What is the standard assumption while conducting the test?
2 prop z interval.
What is the confidence interval used for comparing two proportions?
We are ____% confident that true ____ (in context) is between ____ and__
What is the interpretation of a confidence interval?
Failing to reject when you should have rejected.
What is a Type II error?
Reject the null hypothesis.
What is the meaning of a low(er) p - value?
P (hat) c
What is the pooled sample proportion?
Range of values that contain estimated (true) parameter.
What is the definition of a confidence interval?
The result of the study is statistically significant.
What is rejecting the null hypothesis?
The probability of getting a value as/more extreme than observed value.
What is the definition of p-value?
σP1-P2 = sqrt{ [P1 * (1 - P1) / n1] + [P2 * (1 - P2) / n2] }
What is the standard deviation of two population proportions?
The confidence interval contains 0.
What is no significant difference?
Use this value when the significance level is not stated.
What is a 0.5 significance level?
Measurement of the validity of a hypothesis that is against null hypothesis.
What is the interpretation of p-value?
p1 = p2
What is the null hypothesis of a 2-prop test?
As confidence increases/decreases, margin of error increases/decreases.
What is the relationship between confidence level and margin of error?
The threshold at which a test statistic's value is considered sufficiently extreme to reject the null hypothesis.
What is the critical value?
The combined area of Ha: p≠Po.
What is p-value?
To compare the (plausibly significant) difference/relationship between two independent populations.
What is the purpose of a 2-prop test/interval?