AP Stat Calculator Functions

STAT PLOTS

allows one to show scatterplots, histogras, boxplots, and modifed boxplots

STAT PLOT w/ TRACE

trace the plots :)

1-Var Stats

mean
SD
5-numsum

binompdf (npx) e

gives probability of exactly x successes in n trials where p is probability of success on a single trial

binomcdf (npx)

gives cumulative probability of x or fewer success on a single trial

geometpdf (p, x)

probability that first success occurs on the x'th trial where p is the probability of success on a single trial

geometcdf (p, x)

cumulative probability that the first succses occurs on the x'th trial where p is prob of success

normalcdf (lowerbound, upper bound, mean, SD)

prob that a score is between a lower and upper bound of designated mean and SD

InvNorm (area, mean, SD)

gives the score asociated wtih an area (probability) that a score is between the two bounsd for the designted mean and SD

tcdf (lowerbound, upperbound, df)

gives the probability a score is between the two bounds for the specified df (degrees of freedom)

invT(area, df)

gives the t-score associeated wit han area (probability) to the left of the score under the student t-probability function for specified df (degrees of freedom)

X (squared) cdf (lowerbound, upperbound, df)

gives probability a score is between the two bounds for a specific degrees of freedom

X (squared) GOF-Test

a chi-square goodness-of-fit test to confirm whether sample data conforms to a specified distribution

LinReg (ax + b)

fits the equation y = ax + b to the data in lists L1 and L2 using least squares fit

DiagnosticOn

values for r squared and r are displayed in LinReg

1-PropZInt

(for proportions)
gives a confidence interval for a proportion of successes

2-PropZInt

(for proportions)
confidence interval for the difference between the proportion of successes in two populations

TInterval

(for means)
gives a confidence interval for the difference between the proportion of successes in two populations

2-SampTInt

(for means)
gives a confidence interval for the difference between two popualation means

1-PropZTest

(for proportions)
a hypothesis test

T-Test

(for means)
a hypothesis test

2-SampTTest

(for means

2-PropZTest

(for proportions)
a hypothesis test
compares proportion of successes from two populaitons (making use of the pooled sample proportion)

x-squared test

gives x-squared value and p-value for null hypothesis H0
no association between row and column variables
alternative hypothesis Ha: the variables are related
observed counts must be entered into a matrix

LinRegTTest

linear regresse RegEQion and perfors t0test on the null hypothesis H0: B = 0 (Ho: p=0)
regression is stored in RegEQ (under VARS Statistics EQ) and list of residuals in RESID ( under List Names)