Unit 7 AP stats

sample size

sample size

mE ≥ z* (s/√n)

z*

invNorm (area, μ, σ)

1-sample t-interval

x̄ ± t* (s/√n)

p-value

tcdf (lower, upper, df)

1-sample t-test for means

t = x̄-μo/(sx/√n)

1-sample t-test for paired data

t = x̄d - μd/(σd/√n)

confidence interval to estimate the true mean difference

x̄d ± t* √(s₁²/n₁ + s₂²/n₂)

t*

invt (area, df)

1-sample t-interval for paired t-test

t = x̄ - 0/(s₁²/n)