Statistics and Probability Midterm 01

The total area under the normal curve is

(a)  

What is the shape of the Normal Probability Distribution?

(a)  

Which part of the normal curve is extended both direction along the horizontal axis, approaching but never touching it?

(a)  

A measure of central tendency is called

(a)  

What is another term of mean?

(a)  

The root of variance is called

(a)  

Adding up all the numbers and then divide by the number of numbers is called

(a)  

What is another term for average?

(a)  

Which of the following statements is the definition of variance?

• average of random variable

• product of mean and random variable

• subtract the mean from each random variable

• average of the squared differences from the mean

Translate “The difference between the random Variable X and mean µ ” into mathematical symbol.