Normal Distribution

Question 1

Find the mean of a binomial distribution

Answer 1

Mean=np

Question 2

Z score formula

Answer 2

Z=(data point-mean)/standard deviation. Positive score is greater then mean. Negative score means less then mean. It is limited to two decimal points

Question 3

Binomial probability normal distribution

Answer 3

Probability of success=p

Probability of failure=q

P(x=r)=(n (p^r)*(q^(n-r))
r)

Question 4

Relating binomial and normal distribution

Answer 4

np greater then or equal to 5.
nq greater than or equal to 5.

Mean (mu)=n*p
Standard deviation= root(npq)=root(np(1-p))

Question 5

Central tendency

Answer 5

A single value that describes the way in which a group of data cluster around a central value.