Finding Critical Values of t on Calculators Without invT
Finding Critical Values of t on TI Calculators
Without invT distributon function: We will find critical values of t, t( /2, by constructing a confidence interval with a mean of 0 and a standard error of 1 so that the confidence limits are (t( /2 with df = n – 1.
STAT/TESTS/8:TInterval
Input: Stats
[pic]: 0
[pic]: [pic]
n: n
C-Level: 1 – (
Calculate
For example to find the critical value of t for df = 19 and ( = 0.05 (this could then be used to create a 95% confidence interval for ( when n = 20).
STAT/TESTS/8:TInterval
Input: Stats
[pic]: 0
[pic]: [pic]
n: 20
C-Level: 0.95
Calculate
This gives the confidence interval (–2.093, 2.093) so the t( /2 = 2.093 with df = 19.
With invT distribution function: If you have a newer version of the TI-84 Plus you will have the invT function under DISTR, to use this to find t( /2:
DISTR/4:invT
invT(1 - (/2,df)
For example:
invT(0.975,19)
This gives t( /2 = 2.093024022 with df = 19. (Note: we can round to three decimal places.)
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- statistics critical values calculator t
- t test critical values table
- finding values of a percentage
- z distribution critical values table
- effects of adderall on people without adhd
- critical values to p value calculator
- finding property values by address
- critical value of the t distribution
- find critical values calculator
- table of critical values x2
- critical value of t chart
- critical values for correlation coefficient