Edexcel A-Level Mathematics Statistics overview quiz quiz

Systematic sampling

Opportunity sampling

Stratified sampling

Quota sampling

$np(1-p)$

$\sqrt{np}$

$\frac{n}{p}$

$np$

$P(A \cap B) = P(A) + P(B)$

$P(A \cap B) = P(A)P(B)$

$P(A \cup B) = P(A)P(B)$

$P(A \mid B) = P(B)$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{X - \mu}{\sigma^2}$

$Z = \frac{\mu - X}{\sigma^2}$

$Z = X\sigma + \mu$

$5\%$ placed entirely in one single tail of the distribution

$1\%$ in each tail, with the rest of the level left unused

$2.5\%$ in each tail

$10\%$ in each tail, doubling the stated significance level

$1$ times the interquartile range

$1.5$

$2$ times the interquartile range

$3$ times the interquartile range

$1.1$

$0.8$

$0.9$

$0.3$

Interpolation, reliable

Interpolation, unreliable

Extrapolation, reliable

Extrapolation, unreliable

There is a fixed number of independent trials

The trials are dependent

The probability of success changes each trial

There are three or more outcomes per trial

$N(np, np)$, taking the variance equal to the mean

$N(p, np)$, using $p$ as the mean of the distribution

$N(np, np(1-p))$

$N(n, p)$, using $n$ and $p$ directly as the parameters

The claim being tested for, which is what the experimenter hopes to find evidence supporting

The significance level, the probability used as the threshold for rejecting the hypothesis

The critical region, the set of outcomes that would lead to the hypothesis being rejected

The assumed value of the parameter

Surveys the whole population

Surveys only part of the population

Always uses random selection

Avoids needing a sampling frame