3031045
Description
Flashcards by Georgia Tan, updated more than 1 year ago
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Created by Georgia Tan
over 10 years ago
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| Question | Answer |
| What is the significance level | The threshold at which we reject the null hypothesis |
| What indicates the strength of the evidence against the null hypothesis? | The p-value |
| the smaller the p-value is, | the stronger the evidence is against the null hypothesis. |
| Significance Level= | 1–Confidence Level |
| What is a Type I Error? | rejecting the null hypothesis when it is actually true |
| What is a Type 2 error ? | when we fail to reject the null hypothesis when it is actually false. |
| A type I error is often called a _________ (we incorrectly reject the null hypothesis when it is actually true) | false positive |
| a type II error is often called a_______ (we incorrectly fail to reject the null hypothesis when it is actually not true). | false negative |
| The only difference in setting up a one-sided test versus a two-sided test is the _____ | number of tails |
| How 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. |
| What is =T.TEST(array1, array2, tails, type)? | Hypothesis Test on Excel |
| how to calculate the p value using excel? | T.Test function |
| What 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 |
| What 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 |
| To 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. |
| The null hypothesis is the _______ of the hypothesis we are trying to prove (the alternative hypothesis). | opposite |
| the theory or claim we are trying to substantiate is the _____ | alternative hypothesis |
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