7. Two estimates are available for the same population parameter. Estimate one has a standard deviation of 9.6 and estimate two has a standard deviation of 10.1. Estimate two is unbiased, whereas estimate one is biased. Which estimate would you choose and why? 8. Suppose I want to ask students for their opinion on online classes during the pandemic. I look through my gradebooks and select every 7 student from each claps I taught during the pandemic and send them a survey to complete. What type of sampling method is being used here?