To find the probability that X takes a value between 65 and 86 if X is normally distributed with mean 70 and standard deviation 15, follow the steps in the video below. Since you are allowed boundary values, you don’t have to apply the compliment rule.
This is helpful because it means you do not need to standardize (turn to z-scores) the values before using the command. The normalcdf( command takes inputs of the mean, standard deviation, and an lower and upper boundary. You can expect a question involving a normal probability computation on the AP Statistics exam. The computation of probabilities for random variables that are normally distributed is a core concept in the course. Refer to the video below for steps for doing this on your calculator.
Remember to investigate a residual plot to confirm whether your proposed regression models the data well. Be aware that, when fitting a linear regression model to a set of data, the residuals are automatically stored in a list called RESID. Make sure that your regression diagnostics are turned on. It is unlikely that you will be asked to draw a scatterplot on the exam however, being familiar with creating and analyzing a scatterplot of bivariate data could prove crucial.
#Normcdf ti 84 online plus
In this post, I have compiled a list of 6 of the most important statistics features to know for the TI-84 Plus CE Graphing Calculator. As you take the AP® Statistics exam, some questions will require the use of a calculator to perform a statistical test, compute a probability, or display a graph.
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