We have mentioned alpha level quite a bit in this class. However, the researcher is the one to set the alpha level. So, my question is if you were the researcher, how do you know where to set your alpha level?
To set the alpha level, we should first determine our confidence level. Then we should subtract the confidence level from 1. For example, if you want to be 95 percent confident that your analysis is correct, the alpha level would be 1 – .95 = 5 percent, assuming you had a one tailed test.
We have mentioned alpha level quite a bit in this class. However, the researcher is the...
A social researcher wants to investigate the level of anxiety that people have based on the individual area of residence (urban vs. rural). The researcher uses alpha level of .05 to determine whether there is a significant difference in the level of anxiety between people who live in rural areas and people who live in urban areas. The data is presented in the table below. Rural Urban 14 13 8 7 n 15 15 a. State the null and alternative...
In my class we did an experiement where we measured the flicker frequency of an incandescent bulb and a CFL bulb (powered by a 60hz wall plug) using a photodiode and a osciloscope. We were then asked some questions about the sinusoidal curves that were produced. 1. The incandescent bulb probably has a large "DC offset". Why do you think this is? (im struggling with this question) 2. Is the flicker frequency for each of them the same as the...
Hi, I'm a finance major in a statistics class and I don't have a concrete understanding of some of the stuff we are doing in class. So for example, we normally calculate Z scores given an alpha level, but is it possible to do the opposite - calculate an alpha level given a Z score or a sample statistic critical value? Thanks!
So I have a question regarding my first advanced physics Lab.
I missed the first day so I need quite a bit of guidance. We had to
measure the density of materials, in this case a cylindrical rod,
and we were given a cylindrical rod, string, balance and meter
stick. Note that one side of our rod was cut and one side was round
(shown in the pic below). Below is the calculations we did and the
results we got...
- Let S be a function and B a set. We have seen in class that / -'(B) = /-'(BNR) and f((B)) = BOR, where Rr is the range of / (so you can use them and don't need to prove them). Prove that -' -'(B))) = /-'(B). (4pts)
Students in the class represent a broad range in ages. However, it is probable that we will all grow old. From your reading, what is your greatest concern about growing old and what can you do to minimize the negative effects created by that concern?
I need help with my epidemiology class!!
Question 15 2 pts Suppose we have found that there is a statistically significant association between radon exposure and increased incidence of lung cancer. Choose two of the criteria needed to argue a causal relationship that were discussed in lecture and describe how these criteria could be used to determine that exposure to radon causes lung cancer Remember, the criteria discussed in class were Strength Consistency Specificity Temporality Biological Gradient Plausibility Coherence Analogy...
I'm using Java. I have an assignment where we make a program that checks for the solvability of a grid. It works the same way as an 8 tile puzzle however the size of the grid can differ. A grid is valid if every row has the same number of columns and every column has the same number of rows. My question is what would you write so that the program can know if the grid is valid?
Problem 6 n class we discussed how expensive it is to treat Hepatitis C if you decide to purchase the 12 week treatment Sovaldi developed by GILEAD.We mentioned that one option would beto sign a contract where the patient buys the treatment in monthly payments (just like buying a house) and therefore we called it "mortgage" Suppose that the government decides this is a good idea and that the patient should pay this in monthly payments during 10 years and...
We have an existing Mutex C++ class. It has a debug feature to track the owner thread id. So it has a member variable to store this, but because the original developer doesn't want to waste memory, this member is wrapped by a macro in a header file. This header file has been included in multiple projects, some binaries are developed by other departments, so for those libraries we cannot control the compile flag switch, and we do not want...