The sum of all values divided by the number of values

The difference between the highest and lowest values

The average of the squared deviations from the mean

Standard deviation is the square root of variance

Variance is the square root of standard deviation

How many standard deviations it lies from the mean

The exact probability of that value occurring

The probability that A and another event both happen

The probability of A occurring given another event happened

Subtract the smaller probability from the larger one

The standard deviation of the distribution

At fixed intervals starting from a randomly chosen point

Only from whichever subgroup is easiest to reach

The population is divided into groups and entire groups are randomly chosen

Individuals are picked purely based on availability

Only the single largest subgroup is sampled in full

There is no effect or difference in the population

There is an effect or difference contrary to the null hypothesis

The sample data was collected using a biased method

Accept the null hypothesis as proven true

The null hypothesis has a 3% chance of being true

A one-tailed test checks for an effect in only one direction, while a two-tailed test checks both directions

Statistics Quiz