CASCALC89 COMMAND · NOT ON THE TI-89
zInterval_2Samp
Computes a z confidence interval for the difference of two population means with known σ. The results are stored in stat variables such as stat.ME.
Syntax
zInterval_2Samp σ1,σ2,List1,List2[,Freq1[,Freq2,[CLevel]]]
- Group
- Statistics
- Arguments
- Takes σ1, σ2 and two data lists with optional frequencies and confidence level, or the summary statistics as in the example.
- Availability
- Included
- Origin
- TI-Nspire CAS style command; the TI-89 Titanium handheld does not have it
Example
| Input | Result |
|---|---|
| zInterval_2Samp 2,2,5,8,4,8,0.95:stat.ME | 1.95996398454 |
Typing zInterval_2Samp 2,2,5,8,4,8,0.95:stat.ME on the home screen and pressing ENTER returns 1.95996398454.
Related commands
- zTestPerforms a one sample z test on a population mean when σ is known.
- zTest_1PropPerforms a one proportion z test.
- zTest_2PropPerforms a two proportion z test that compares two population proportions.
- zTest_2SampPerforms a two sample z test on the difference of two population means with known σ.
- χ²2wayPerforms a χ² test for association on a two way table of observed counts; it is the same command as chi22way.
- χ²GOFPerforms a χ² goodness of fit test that compares observed counts with expected counts; it is the same command as chi2GOF.
- ANOVAPerforms a one way analysis of variance to compare the means of several groups.
- ANOVA2wayPerforms a two way analysis of variance on several lists of data.