Statistics and Probability Theory Made Easy for theTI89/Titanium/92+/Voyage200 - Home Statistics TI89 App with Step by Step Solutions Solve Statistics questions stepwise using the TI89 CalculatorScroll down to selectAPP and observe the providedStep by Step solutions to the right. The main menuConfidence Intervals -with ease and stepsCI for a mean with knownStandard DeviationStatistical Tests -with ease and stepsZ Test for proportionsChi Square Goodness of Fit TestAnalyze data -with ease and stepsFind Mean, geom.
TI-89 Home ScreenTI-89 Stats/List EditorNotice the difference: When you’re in the catalog, thecalculator puts you into alpha mode, so you don’t press ALPHA to select a letter. But when you’re in theStats/List editor, you do press ALPHA to select aletter.Keystrokes CATALOG F3 plain ( makes B ▼ F5 ALPHA ( makes BFormatbinompdf(n, p, x)(dialog box)Example 1: Larry’s batting average is.260. If he’sat bat four times, what is the probability that he gets exactly twohits?Solution:n = 4, p = 0.26, x = 2Note: Some textbooks use r for number of successes, rather than x.binompdf(4.26,2) = 0.2221 Binomial Probability for a Range of x ValuesTo compute the binomial probability for arange of numbers of successes from xlow toxhigh, use thebinomcdf function.
TI-89 Home ScreenTI-89 Stats/ListKeystrokes CATALOG F3 plain ( makes B F5 ALPHA ) makes CFormatbinomcdf(n, p, xlow, xhigh)(dialog box)Example 2: Larry’s batting average is.260. If he’s at batsix times, what is the probability that he gets two to four hits?Solution:n = 6, p = 0.26, 2 ≤ x ≤ 4binomcdf(6.26,2,4) = 0.4840Example 3: Suppose 65% of the registered voters in Dryden areRepublicans.
In a random sample of ten registered voters, what’sthe probability of fewer than six Republicans?Solution: “Fewer than six” iszero through five.n = 10, p = 0.65, 0 ≤ x ≤ 5binomcdf(10,.65, 0, 5) = 0.2485There’s about one chance in four of getting fewer than sixRepublicans in a random sample of ten registered voters.Example 4: With the same data, what’s the probability of gettingeight or more Republicans?Solution: “Eight or more” means eight toten since there are only ten trials.binomcdf(10.65,8,10) = 0.2616Example 5: A fair die has a 1/6 chance of rolling a 2. In 24 rolls,what's the probability of getting no more than three 2’s?Solution: “No more than three” meanszero to three.n = 24, p = 1/6,0 ≤ x ≤ 3binomcdf(24,1/6,0,3) = 0.4155 What’s New.
Statistics Programs Ti-89 Free
5 Oct 2016: between selecting letters from the catalog and fromthe Stats/List Editor. 31 Jan 2016: Since “Binomial Probability Distributionon TI-83/84” has been withdrawn, directto the textbook. (intervening changes suppressed). 17 Jun 2007: New article.