Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Bus Stats II Exam 2
Concepts/Excel and Problems
| Question | Answer |
|---|---|
| Which excel formula is used when testing for the difference of two population means when sigma is known? | The Z-Test: Two Sample for Means |
| Which excel formula is used when testing for the difference of two population means when sigma is unknown? | The T-Test: Two Sample Assuming Unequal Variances |
| Which excel formula is used when testing for dependent means, or matched samples? | The T-Test: Paired Two Sample for Means |
| Which excel formula is used when testing for the difference of two population proportions? | The Two Proportion Z-Test |
| Which distribution is used for Z-tests? | The standard normal distribution |
| Which distribution is used for T-tests? | The Student's T test distribution |
| Which distribution is used for Chi-Square tests? | The Chi-Square distribution |
| What does Matrix I represent? | The actual or observed values |
| What does Matrix II represent? | The expected values |
| What is used to calculate the expected values? | The marginal totals |
| What three things can the Chi-Square (CHISQ.TEST) test for? | Equality of population proportions for three or more populations, independence and goodness of fit |
| What does the equality test of three or more populations test for? | If each proportion is equal to one another |
| What is the null hypothesis of the equality test? | p1 = p2 = p3 |
| What is the alternative hypothesis of the equality test? | Not all population proportions are equal |
| If we reject the null when using the equality test what can we conclude? | There is enough evidence to show that not all population proportions are equal |
| When testing for equality and using a multiple comparison procedure, what procedure do we use? | The Marisculo Procedure |
| What does the test of independence test for? | Testing to see if there is a relationship between the two variables |
| What is the null hypothesis of the independence test? | Variable one is independent of variable two |
| What is the alternative hypothesis of the independence test? | Variable one is not independent of variable two |
| If we reject the null when using the independence test what can we conclude? | There is a relationship between the variables |
| What does the goodness of fit test for? | Testing to see if the a distribution of data follows a known distribution |
| What is the null hypothesis of the goodness of fit test? | The data does follow a known distribution |
| What is the alternative hypothesis of the goodness of fit test? | The data does not follow a known distribution |
| What is the ANOVA (Anova: single factor) test used for? | If three or more population means are equal |
| What is the null hypothesis of the ANOVA test? | u1 = u2 = u3 |
| What is the alternative hypothesis of the ANOVA test? | Not all population means are equal |
| What can we conclude if we reject the null hypothesis in an ANOVA test? | There is enough evidence to show that not all population means are equal |
| What is the next step after rejecting a Null hypothesis in an ANOVA test? | A multiple comparison procedure using Fisher's LSD |
| Which hypothesis test should be used when sigma is unknown and u1 - u2 > 0? | T-Test for two sample assuming unequal variance |
| What p-value is used when less than or greater than signs are present? | One-tailed p-value |
| When the p-value is less than alpha what do we do? | Reject the null hypothesis |
| When do confidence intervals and conclusions agree? | When the concluded hypothesis and confidence interval are either both greater than or less than 0 |
| Which hypothesis test should be used when sigma is known and u1 - u2 is < 0? | Z-Test for two sample means |
| Which hypothesis test should be used when two means are dependent on each other and the null is ud = 0? | T-Test paired two sample for means |
| Which hypothesis test should be used when p1 - p2 = 0? | Two proportion Z-test |
| What p-value is used when equal signs are present? | Two-tailed p-value |
| Which hypothesis test should be used when p1 = p2 = p3? | Chi-Square equality of population proportions for three or more populations |
| Which hypothesis test should be used when the variables are independent or not independent? | Chi-Square test of independence |
| Which hypothesis test should be used when u1 = u2 = u3....? | The ANOVA test |
| What multiple comparison procedure is used when the null hypothesis is rejected in an ANOVA test? | Fisher's LSD, which figures out which means are different |
Created by:
Erika.Meakins
Popular Business sets