Use the chi-squared test to compare observed and expected values. For example, a genetic experiment might hypothesize that the next generation of plants will exhibit a certain set of colors. By comparing the observed results with the expected ones, you can decide if your original hypothesis is valid. X is the value at which you want to evaluate the distribution. Use the chi-squared distribution to compare observed results with expected ones to decide if your original hypothesis is valid.
Probability is a probability associated with the chi-squared distribution.
You can use chi-squared tests to determine if hypothesized results are verified by an experiment. Returns the confidence interval for a population mean. The confidence interval is a range on either side of a sample mean. For example, if you order a product through the mail, you can determine, with a particular level of confidence, the earliest and latest dates the product should arrive. Alpha is the significance level used to compute the confidence level.