U8 - Probability distributions

Question 1

B(n,p)

Answer 1

A binomial distribution with (n) number of trials and probability of success (p)

Question 2

Conditions of a binomial distribution (4)

Answer 2

1) Fixed number of trials
2) Each trial has 2 outcomes, success or failure
3) All the trials are independent of each other
4) The probability of success is constant

Question 3

What is a standardised score?

Answer 3

The standardised score of a data value is the number of standard deviations above or below the mean that the data value lies

Question 4

What does it mean if a standardised score is

i) positive
ii) negative

Answer 4

i) The score is greater than the mean

ii) The score is less than the mean

Question 5

What does quality assurance involve?

Answer 5

Checking samples to ensure that the product of a manufacturing process meets the required standards

Question 6

What is a control chart?

Answer 6

A time series chart that is used for quality assurance