O'Reilly logo

The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Example of a One-Tail Hypothesis Test

Because I formulated the alternative hypothesis for the golf ball example as > 20, this becomes a one-tail test. The hypothesis for this example is stated as:
H0 : µ ≤ 20 yards
H1 : µ > 20 yards
Where m = the mean increase in yards off the tee using my new golf ball.
 
Let’s say that I know that the standard deviation of the population, σ, is 5.3 yards and my sample size to test the hypothesis, n, is 40 golfers. For this example, we’ll set α = 0.01. The standard error of the mean, σ x, will now be equal to:
457
Let’s assume the sample mean from the 40 golfers is 22.5 yards. What is our conclusion ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required