# BSNS102 3

 The flashcards below were created by user Anonymous on FreezingBlue Flashcards. Confidence Interval for : One Proportion Conditions: (Binomial conditions)2 possible outcomesFixed number of trialsConstant probability of successIndependant trials(Assumptions)Random sampleGreater than or equal to 5 Confidence Interval for: One Mean Conditions: (Binomial conditions)2 possible outcomesFixed number of trialsConstant probability of successIndependant trials(Assumptions)Random sampleGreater than or equal to 5 Confidence Intervals for: Difference in Two Proportions Conditions: 2 independant random samplesNormal approximation to the binomial holds - more than 5, both samples large Z test for differences in two means (Variences Known) Conditions: Two independant random samplesIf sample sizes are small, samples are drawn from normal populationsPopulation variances are known t test for difference in two means (Variances unknown) Conditions: Both populations are normally distributedTwo independant random samplesPopulation variances are unknownIf either population is not normal, need large sample sizes to appeal to CLT What is P value? A p value is the probability of getting a test statisitic at least as extreme as the test statisitic from the sample given that the null hypothesis is true What does the test statistic measure? The test statisitic measures the number of standard errors that the sample statistic is away from the value of the population parameter in the null hypothesis AuthorAnonymous ID90020 Card SetBSNS102 3 DescriptionConfidence Intervals for 1 propn,1 mean, diff in 2 mean, diff in 2 propn, hypothesis tests Updated2011-06-10T09:49:34Z Show Answers