Flashcards
Analytics W3
Flashcards do conjunto (17)
- 1What is the significance levelThe threshold at which we reject the null hypothesis
- 2What indicates the strength of the evidence against the null hypothesis?The p-value
- 3the smaller the p-value is,the stronger the evidence is against the null hypothesis.
- 4Significance Level=1–Confidence Level
- 5What is a Type I Error?rejecting the null hypothesis when it is actually true
- 6What is a Type 2 error ?when we fail to reject the null hypothesis
when it is actually false. - 7A type I error is often called a _________ (we incorrectly reject the null hypothesis when it is actually true)false positive
- 8a type II error is often called a_______ (we incorrectly fail to reject the null hypothesis when it is actually not true).false negative
- 9The only difference in setting up a one-sided test versus a two-sided test is the _____number of tails
- 10How many tails for a 1-sided test? How many tails for a 2-sided test?1 for a one-sided test and 2 for a two-sided test.
- 11What is =T.TEST(array1, array2, tails, type)?Hypothesis Test on Excel
- 12how to calculate the p value using excel?T.Test function
- 13What is the purpose of single-population hypothesis test?collecting a sample from one population and testing to see if its average was significantly different from the historical average
- 14What is the purpose of two-population hypothesis tests?comparing samples from two different populations - 1 is typically the control group and the other is the treatment group
- 15To perform a two-sample test in Excel, which function do we use?we use the same T.TEST function we used earlier. only difference is that we use the actual data from the second sample for our second column of data.
- 16The null hypothesis is the _______ of the hypothesis we are trying to prove (the alternative hypothesis).opposite
- 17the theory or claim we are trying to substantiate is the _____alternative hypothesis
Informações
- Descrição
- Professional Harvard CoRE (Business Analytics) FlashCards sobre Analytics W3, criado por Georgia Tan em 05-07-2015.
- Criado por
- Georgia Tan
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