If p ≤ .01 →“highly significant.” How to Calculate a P Value on the TI 83 Example question:The average wait time to see an E.R. doctor is said to be 150 minutes. You think the wait time is actually less. You take arandom sampleof 30 people and find their average wait is 14...
Finding the Z-value of a P-ValueYou can also use p-values (probability) to find z-values.For example:"How tall are you if you are taller than 90% of Germans?"The p-value is 0.9, or 90%.Using a Z-table or programming we can calculate the z-value:...
How would you use the t-distribution to find the p-value associated with a t-value of 2.8 for two-tailed t-test (in both directions)? Hint:In Minitab, adjust the options in step 5 to find the probability for both tails. If you don't have a copy of Minitab, download a free30-d...
Sample problem: Find the mean for a binomial distribution with n = 5 and p = 0.12. Again, the TI 83 doesn’t have a function for this. But if you know the formula (n*p), it’s pretty easy to enter it on the home screen. Step 1: Multiply n by p. 5 *...
If you’re learning regression and like the approach I use in my blog, check out myIntuitive Guide to Regression Analysisbook! You can find it on Amazon and other retailers. Note: I wrote a different version of this post that appeared elsewhere. I’ve completely rewritten and updated it fo...
Find the test statistic calculator TestAssumptionsRequired sample data #Test nameCheckStatistic Indσσ1=σ2dμ/px̄/p̂;nS 1One Sample Z-TestMean ✔✔✔✔✔✔ 2One Sample T-TestMean ✔✔✘✔✔✔✔ 3Two Sample Z-TestMean ...
Find the test statistic calculator TestAssumptionsRequired sample data #Test nameCheckStatistic Indσσ1=σ2dμ/px̄/p̂;nS 1One Sample Z-TestMean ✔✔✔✔✔✔ 2One Sample T-TestMean ✔✔✘✔✔✔✔ 3Two Sample Z-TestMean ...
1. How is the statistical significance of an insight assessed? Hypothesis testing is used to find out the statistical significance of the insight. To elaborate, the null hypothesis and the alternate hypothesis are stated, and the p-value is calculated. After calculating the p-value, the null ...
The score went down last month and she want’s to know why. Looks like you’ll have to hunt around to find a reason for the change; or will you? Just because your survey score has gone down, or up, doesn’t mean that there has actually been a change in the overall business NPS....
To find this value, we need the significance level (α = 0.05) and thedegrees of freedom. The degrees of freedom (df) are based on the sample sizes of the two groups. For the body fat data, this is: $ df = n_1 + n_2 - 2 = 10 + 13 - 2 = 21 $ ...