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Minimum sample size for or USA
Rounding with minimum sample size formula
Round up
Basics for one proportion hypothesis test
population parameter: p
Point estimate: p-hat
Conditions
Majority problems
Special kind of proportion test
Test for majority problems (more than half
No majority (even): null = 0.5
Majority =/ 0.5
Steps for hypothesis testing
Identify variables, hypothesis, claim, alpha
Check conditions
Find test statistic/zscorei, area, p-value, sketch
Compare p value to alpha, conclusion
Important note
Reject null hypothesis = significant difference between null and sample => STATE VALUE HIGHER OR LOWERRR (NOT JUST DIFFERENT)
how to interpret confidence interval
we are % confident that x%-x% of ____