I am trying to understand:

t-test sample assuming unequal variance

t-test: two sample assuming equal variance

t-test: paired two sample for means

z-test for two population proportions

1. A person wants to know whether the average waiting time for restaurant A is longer than the average waiting time of restaurant B. Assume the population variances are equal. What statistical method should be used? t-test: two sample assuming equal variance

2. A customer wants to know whether Walmart is cheaper than Win-Dixie in Meridian. What statistical method should be used? T-test: two sample assuming unequal variance

3. A person wants to know whether there is evidence of difference between two hotels with regard to percentage of customer satisfaction. What statistical method should be used? t-test: two sample assuming equal variance

4. An individual wants to conduct a study to see whether there is a difference between two age groups (10-19 and 20-29) about their average time spend on Facebook. What statistical method should be used? t-test paired two sample for means

5. A customer wants to know whether there is evidence of a difference in population mean price between Walgreen and CVS. What statistical method should be used? z-test for two population proportions

6 . A polling company wants to conduct a survey to see whether the percentage of voters who will vote candidate A is higher than the percentage for candidate B. What statistical method should be used? z-test for two population proportions

7. A person wants to know whether the average gas price in county A is less than the average gas price in county B. Assume the population standard deviations are equal. What statistical method should be used? T-test: two sample assuming equal variance

8. A student in a college wants to know whether there is evidence of a difference between male students and female students with regard to average time spent on study each week. What statistical method should be used? t-test paired two sample for means