When working with statistics, OpenOffice.org Calc is handy to calculate a confidence interval. The purpose is to estimate the mean (average) of a population from a sample of the population. As a typical example
Value at Risk (VaR) is a financial metric that estimates the risk of an investment. More specifically, VaR is a statistical technique used to measure the amount of potential loss that could happen in an investment portfolio over a specified period of time. Value at Risk gives the probability ...
where,α^andβ^are least squares estimates ofαandβ, respectively. Finding the standard deviation of log10(X^0) is not a simple statistical problem as it is a non-linear function of the estimated intercept and slope parameters. Thus for given X, a 100(1-α)% confidence interval is cons...
Here we need to be careful that all of the units we are using are the same. There will not be as many conversions if we do our calculations with inches. Since there are 12 inches in a foot, five feet corresponds to 60 inches. Thez-score for this problem is (62 - 60)/3 and is...
Fig. 5-Process Capability Analysis of TOC Data Set with "Hot Spots"-The Minitab report lists the PPU (process performance upper) rather than the Cpu (process capability upper). Note that a confidence interval (CI) for the process capability can also be calculated. At...
interval. The next column (I) accumulates the Total time-currency by adding all the time-currency calculated for each row in a sequential manner row by row. Columns H and I comprise the time-currency invested or borrowed portion of the invention. The next column (Column J) inputs the ...
In this case Z0.95 = 1.645. Other common confidence levels used are 90% and 99%. Corresponding z values are given below for convenient reference: Confidence levelz 90% 1.282 95% 1.645 99% 2.326 Example: Given one-year monthly data of AMZN, TSLA and AAPL within the time interval of 11/...