What is a Normal Distribution Curve?

## Example of a histogram with fitted normal distribution

Thank you very much! When you fit a normal distribution, Minitab estimates these parameters from your sample. Interpret the results The heights of the bars follow the shape of the fitted distribution line relatively closely. Interpretation Minitab uses the Anderson-Darling statistic to calculate the p-value.

Cross Validated works best with JavaScript enabled. Ben, You are using a built-in NORMDIST function to fit the data, but how to modify your procedure to fit an arbitrary function, such as the two- or three-parameter Weibull distribution, to a skewed data set?

Find definitions and interpretation guidance for every statistic that is provided with a histogram with a fitted normal distribution. Even if all the means equalled the corresponding medians exactly, and all the skewness and kurtosis values were exactly what they would be for the normal, it doesn't mean that your populations are close to normal indeed the samples can be clearly not from a normal distribution but you could still have all of those things be true.

Do you why this is the case? Select the vertical axis. The Anderson-Darling test uses sample data to determine whether to reject the null hypothesis.

Previous measurements found that the population standard deviation is 2. You have two options: Hi Masi, this tutorial assumes only positive numbers since they are exam scores , so I suggest sharing your specific question and spreadsheet on the Google Sheets help forum: Cheers, — Christian.

The new chart editor opens in a side pane, but the steps and options are essentially the same. A scientist for a company that manufactures processed food wants to assess the percentage of fat in the company's bottled sauce.

Should I always start my bins with 0?

Maximum The maximum is the largest data value. Larger values for the Anderson-Darling statistic indicate that the data do not follow a normal distribution.