Normal and Binomial Distribution

Question 1

What is normal distribution?

Answer 1

A suitable model to calculate probabilities if these conditions are met:
The data is continuous
The distribution is symmetrical and bell shaped
The mode median and mean are appproximately the same

Question 2

How to calculate the number of standard deviations form the mean

Answer 2

Number of standard deviations from the mean= value-mean /standard deviation

Question 3

What is a probability distribution?

Answer 3

A list of all the possible outcomes together with their probabilities

Question 4

What is binomial distribution?

Answer 4

A suitable model to calculate probabilities if these conditions are met:
The number of trials are fixed
Trials are independent
There are two possible outcomes for each trial (success and failure)

Question 5

Binominal distribution notation

Answer 5

B(n,p) to denote a binomial distribution with n= number of trials and p= probability of success (q= probability of failure)

Question 6

Mean of binominal distribution

Answer 6

mean of B(n,p) is np