Posts filed under statistics

Confused with Mean, Mode, Median, Average, Standard Deviation, Range? Have a TI89 Calculator? Here is how to do it!

Here is the quick way to find Mean, Mode, Median, Average, Standard Deviation, Variance, Range and more using the trusted TI89 : Just enter the list of numbers as shown in the image above. Press ENTER and Voila, all values are shown immediately. This is part of the comprehensive Statistics Made Easy app for the… (read more)

Normal Distribution on the TI89 using Statistics Made Easy

Read below please: ex1. What is the probability of obtaining a sample mean greater than M=60 for a random sample of n=16 scores selected from a normal population with a mean of 65 and a standard deviation of 20? Go To F3 7 and select Normal distribution, enter mu=65 std dev=20/sqrt(16)=20/4 = 5 so just… (read more)

How to perform a Z-Test Step by Step on the TI 89 using Statistics Made Easy

Here is a sample problem: A student who works in the blood lab plans to test the hypothesis that the mean cholesterol level of men is less than 230 mg/dL. The population variance of cholesterol level is assumed to be (40 mg/dL)^2. The student tested nine men for cholesterol levels and found the following values… (read more)

Review for the www.TI89.com app : Statistics Made Easy

Stats made easy made my stats class a breeze. I got all answers correct thanks to the stats program. I love the program and will try to impress on others that the money is worth every penny when you can get an A in the class. I got a 93% in my Stats class. Thank… (read more)

User comment (M.B.): Just want to thank you for the fabulous programs for Statistics

Stats made easy made my stats class a breeze. I got all answers correct thanks to the stats program. I love the program and will try to impress on others that the money is worth every penny when you can get an A in the class. I got a 93% in my Stats class. Thank… (read more)

Can Stats Made Easy calculate the P-Value if you just give it a Z-score?

Probability density functions

1-Moment Generating functions are to be added. 2-Probabilty Density Function They are under F3 3- Uniform Density Function Also under F3. Option 2 in dropdown lets you accumulate. 4- Cumulative Density Function. Also under F3. cumulative option is in the dropdown options.

Business Statistics App

> Q: I was wondering if this app does one-tailed and two-tailed rejection region tests. > > > A: yes. It does that for all types of statistical tests, step by step. You may select at the levels too 5% , 1% etc