OCR A-Level Further Maths A Statistics option overview quiz quiz

all be equal

sum to one

sum to the number of values

be greater than one

$\sum x^2\,\mathrm{P}(X = x)$

the largest value

$\sum x\,\mathrm{P}(X = x)$

$\sum \mathrm{P}(X = x)$

$[\mathrm{E}(X)]^2 - \mathrm{E}(X^2)$

$\mathrm{E}(X) - \mathrm{E}(X^2)$

$\mathrm{E}(X^2)$

$\mathrm{E}(X^2) - [\mathrm{E}(X)]^2$

$a^2\mathrm{Var}(X)$

$a\mathrm{Var}(X) + b$

$a\mathrm{Var}(X)$

$a^2\mathrm{Var}(X) + b$

summing the pdf values across the interval

integrating the pdf over an interval

differentiating the pdf at the endpoints

reading off the maximum value of the pdf

$F(x) = f'(x)$

$F(x) = f(x)^2$

$F'(x) = f(x)$

$F(x) = 1 - f(x)$

$\lambda$ and $\lambda^2$

$np$ and $np(1-p)$

both equal to $\frac{1}{\lambda}$

both equal to $\lambda$

$n$ is large and $p$ is small

$n$ is small and $p$ is large

$n = p$

$p = 0.5$

$p$

$\frac{1}{p}$

$1 - p$

$\frac{p}{1-p}$

$\sum (O - E)$

$\sum \frac{O^2}{E}$

$\sum \frac{(O - E)^2}{E}$

$\sum \frac{(O - E)^2}{O}$

$(r + 1)(c + 1)$

$r + c - 1$

$rc - r - c$

$(r - 1)(c - 1)$

sign test

t-test

chi-squared test

z-test