When can we use a normal distribution to approximate a binomial distribution?

a. when n > 5

b. when n * q is greater than or equal to 5

c. when n * p is greater than or equal to 5

d. when both n * p and n * q are greater than or equal to 5

Two events are independent if

a. P(A|B) P(A) and P(B|A) P(B)

b. P(A|B) = P(A) and P(B|A) = P(B)

Interpret the quantity (x)²:

a. square each x value and add up the squares

b. add the x values and square the result

c. none of the above are accurate

x =

a. x / N

b. x / n