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## Exponential Probability Calculator

Instructions: Compute exponential distribution probabilities using the form below. Please type the population mean $$(\beta)$$, and provide details about the event for which you want to compute the probability for. Notice that typically, the ...

## Z-test for One Population Mean

Instructions: This calculator conducts a Z-test for one population mean ($$\mu$$), with known population standard deviation ($$\sigma$$). Please select the null and alternative hypotheses, type the hypothesized mean, the significance level, the ...

## Pie Chart Maker

Instructions: The following graphical tool creates a pie chart based on the data you provide in the box below. All you have to do is type your data and the name of the categories. The tool will deliver a pie chart with the corresponding percentages ...

## Calculation of Descriptive Statistics

Instructions: Enter the sample data below and the solver will provide step-by-step calculation of the basic descriptive statistics, such as the mean, median, mode, variance, standard deviation, range, quartiles, 5-number summary, etc. Type the ...

## Critical Z-Values

Instructions: Compute critical z-values for the normal distribution probabilities using the form below. In order to do so, please type significance level $$\alpha$$, and indicate the type of tail (left-tailed, right-tailed, or two-tailed) ...

## Phi Coefficient Calculator

Instructions: This calculator computes the value of the Phi Coefficient. Please first indicate the number of columns and rows for the cross tabulation, and then type the table data: Num. Rows = Num. Cols =    Column 1Column 2 Row 1 Row 2 ...