Identify the Statistical Test Formula of the following assumptions 1. Test for a single mean when the population variance is known. 2. Test for a single mean when the population variance is unknown and the sample size is more than 30. 3. Test for a single mean when the population variance is unknown and the sample size is less than 30. 4. Test for the mean of paired observations. 5. Test for the difference of means from independent samples when the population variances are unknown. 6. Test for the difference of means from independent samples when the population variances are unknown and the samples are more than 30. 7. Test for the difference of means from independent samples when the population variances are unknown and the samples are not more than 30. 8. Test about a single proportion. 9. Test comparing two proportions. 10. Test about a single variance or standard deviation. 11. Test about two variances or standard deviations. Give example in each assumptions