thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

Data & Analytics · Intermediate

Binomial Distribution

The distribution of the number of successes in n independent trials, each with the same success probability p.

Definition

The mean is np and the variance np(1 - p). Examples include defective units in a batch or conversions among visitors.

Example

The number of heads in 10 coin flips follows Binomial(10, 0.5).

Exam tip

Fixed number of trials + yes/no outcomes + constant p = binomial.

Related terms