WEEK 6

Question 1

What is a binomial distribution

Answer 1

A binomial distribution shows the probability of getting a certain number of successes in a fixed number of independent trials, where each trial has only two possible outcomes:
Success or Failure

Question 2

Conditions of binomial distribution

Answer 2

1. There are only two outcomes (success/failure)
2. There are a fixed number of trials (n)
3. Each trial is independent
4. The probability of success (p) stays the same each time

Question 3

A binomial distribution is denoted as X~B(n, p). What does the ‘n’ and the ‘p’ represent?

Answer 3

n = the number of independent trials
p = the probability of success in each trial

Question 4

What is a normal distribution

Answer 4

A normal distribution is a bell-shaped probability distribution that is symmetrical about its mean with
equal measures of centre (mean, median, mode)

Question 5

How is a normal distribution denoted

Answer 5

X ~ N(μ, σ2)
The mean μ is the central point of the distribution and the standard deviation σ measures the spread of
data around the mean.

Question 6

What is the standard normal distribution

Answer 6

A standard normal distribution has a mean of 0 and a variance of 1.