Test #5- hypothesis testing Flashcards
what is an hypothesis
a claim about a property of a population.
what is a hypothesis test
a procedure for testing the validity of that claim.
what is Ho
null hypothesis (contains the equality)
what is Ha
alternate hypothesis (doesn’t contain the equality)
what is the goal of hypothesis testing
trying to see if our sample results are extreme enough to reject the null hypothesis.
what are critical values
they are the threshold of how many standard deviations away the sample results are away from the population stats. With them, we can confidently reject all the null hypothesis.
what is a significance level
the probability of making an error of rejecting the null hypothesis when it is true.
finding test value (mean)
x-M / (s.d. / root n)
verifying the conclusion; if p value is smaller or equal to significance level;
Ho is rejected
verifying the conclusion; if p value is bigger than significance level;
Ho is accepted
what is P-value
the probability to obtain test value from sample
what are the 2 techniques of hypothesis testing
- hypothesis testing with means
-hypothesis testing with proportions
finding test value (proportion)
T.V= ^P(sample) - P(population) / (root Pq (q= 1-P)) / n
test stats with calculator for means
1- input list
2- STAT, TESTS, 2, input parameters
test stats with calculator for proportions
STAT, TESTS, 5
