4. A sociologist survéys 50 randomly selected citizens in each of two countries to compare the mean number of hours of volunteer work done by adults in each. Among the 50 inhabitants of Genovia, the mean hours of volunteer work per year was 52, with population standard deviation, o, 11.8. Among the 50 inhabitants of Wakanda, the mean number of hours of volunteer work per year was 37, with population standard deviation, o, 7.2. Construct the 99% confidence interval for the différence in mean number of hours volunteered by all residents of Genovia and the mean number of hours volunteered by all residents of Wakanda.

Please show step-by-step solution and do not skip steps. Explain your entire process in great detail. Explain how you reached the answer you did.

please give me a step by step solution for the following problem: 6(-9)-(-8)-(-7)(4)+11

How do I put the following phrase into an equation: for each 100kg of food produced, 5 additional kg of other material is added?

I asked this question earlier but was still very confused on how to solve the problem. If you can please write out step by step and show exactly how to solve this problem it would help give me a more clear visual way on how to solve this. Thank you. QUESTION:

I attached a picture. I was able to do the simpler problems where you plug in a number for x (#1-4), but I do not remember how to set up the problem/equation once I have to use just x (#5-8). Once I learn that I think I will be able to do the problems in the second picture (a,b,c). Thank you!

I am really struggling with this problem I don't even know what to do with this problem can you please please help me I am desperate I really don't know what to do with this problem. can you please do this problem I am begging you and can you please label these steps so I can follow along and can you make easier to read and can you do the problems step by step without skipping any steps thank you I will greatly appreciate it

Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study:   Patient            7-Minute         Screen Cognitive Tests  A                            3                           11  B                            8                           19  C                          10                           22  D                            8                          20  E                            4                           14  F                            7                           13  G                           4…