Statistics and Probability Answers

Is the F-distribution symmetric?

How can we detect non-linearity of regression function?

What is the difference between X-chart and R-chart?

If you determine that for the graph of a std. normal distribution, the cumulative area to the left of a z score is 0.4, what is the cumulative area to the right?

Suppose that the probability of a Web server failure is 30 percent per year and the
site is estimated to be down two hours while the system is repaired. If the ecommerce
site hosted on this server generates $10,000 an hour, find how much
money is needed to be budgeted to deal with this risk under the following
conditions:
a) The server will be repaired within the two hours (i.e., no server replacement is
needed); and
b) The server needs to be replaced and the cost of the new server is $6000.

I have a dataset (excel table) from the Duke University Cardiovascular Disease Databank and consists of 3504 patients and 6 variables. The patients were referred to Duke University Medical Center for chest pain. Some interesting analyses include predicting the probability of significant (>= 75% diameter narrowing in at least one important coronary artery) coronary disease, and predicting the probability of severe coronary disease given that some significant disease is "ruled in." The first analysis would use sigdz as a response variable, and the second would use tvdlm on the subset of patients having sigdz=1. Severe coronary disease is defined as three-vessel or left main disease and is denoted by tvdlm=1. sex=0 for males, 1 for females.

Indicated degree of likelihood as a probability value between 1 and O = a sample space consists of 10 separate events that are equally likely. What is the probability of each?

How can I relabel a graph or pie chart in excel 2010 so that it has the name of the color of the data(color of specific car sold) instead of the numbers(1,2,3etc) It is a graph and pie chart that is associated with the formulas in the cells and the numbers associated with it.

The sample mean is 50, the t-statistic is 1.96, and the standard error of the sample mean is 2. What is the 95 percent confidence interval?

Find the population variance, sample variance, population standard deviation, and the population standard deviation of the following:

Elementary Secondary
938 977 194 518 403 423 85 156
711 599 1196 497 424 327 401 362
824 885 137 575 240 333 44 205
139 913 417 849 43 274 223 285