4. Describe the distribution.
Use SECS. Answer in context. Write a description, not a list.
For scatterplots: direction (+ or -), strength, form (linear?), outliers
5. Interpret the meaning of the p-value.
P-value is the probability of obtaining a sample
Linear Regression:
1. Stat - calc - linreg(a + bx) xlist - , - ylist - , vars yvars
function Y1
This sequence creates a least-squares regression line for two quantitative
variables and sends that equation to Y1. This will also provide you with
the correl
Example: Heart rates are normally distributed with mean of 72 and a standard
deviation of 8. What is the probability of obtaining a random sample of 5
individuals with a mean heart rate of less than 65? Ans: normalcdf(-1E99, 65, 72,
8/5).
2. invNorm (%):
Other Important Calculator Reminders:
1. When you perform a linear regression, r and r-squared should appear on
the screen. If you have reset your calculator or replaced the batteries, they
may not appear. To get them back, you must go to 2nd and catalog.