Casio FX-CG10 Software User Guide - Page 242
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The following shows the parameter data specification items that are different from list data specification. Calculation Result Output Example u 2-Sample t Interval 2-Sample t Interval calculates the confidence interval for the difference between two population means when both population standard deviations are unknown. The t interval is applied to t distribution. Perform the following key operations from the List Editor. 4(INTR) 2(t) 2(2-SAMPLE) 7. Distribution There is a variety of different types of distribution, but the most well-known is "normal distribution", which is essential for performing statistical calculations. Normal distribution is a symmetrical distribution centered on the greatest occurrences of mean data (highest frequency), with the frequency decreasing as you move away from the center. Poisson distribution, geometric distribution, and various other distribution shapes are also used, depending on the data type. Certain trends can be determined once the distribution shape is determined. You can calculate the probability of data taken from a distribution being less than a specific value. For example, distribution can be used to calculate the yield rate when manufacturing some product. Once a value is established as the criteria, you can calculate normal probability when estimating what percent of the products meet the criteria. Conversely, a success rate target (80% for example) is set up as the hypothesis, and normal distribution is used to estimate the proportion of the products will reach this value. 6-49