Prob Stat Chapter 5 Review

A variable that take an uncountable number of potential values, regularly measurable amounts.

• Continuous

• Discrete

• Independent

• Dependent

What is the probability of getting atleast 2 heads in tossing 3 coins?

• 30%

• 50%

• 60%

• 75%

A discrete random variable has the following probability distribution of P(1)=1/4, P(2)=1/2. Find P(3)

• 1/4

• 1/2

• 3/4

• 1/3

A random variable X has the following probability distribution of P(0)=0.3, P(1)=0.2, P(3)=0.2 and P(4)=c. Find the value of c.

• 0.1

• 0.2

• 0.3

• 0.4

If the domain of a uniform continuous probability density function is 3.0 < X < 22.0, then its height is

• 0.0526

• 0.045

• 1

• 0.322

True/False: All normal curves are symmetric and bell-shaped.

• True

• False

If the domain of a continuous uniform probability density function is 1.0 < X < 15.0, then its height is

• 0.15

• 0.0356

• 0.0671

• 0.0714

The Standard Normal curve has a mean of zero and a standard deviation of one.

• True

• False

There are as many possible Normal Curves as there are possible combinations of means and standard deviations.

• True

• False

By the Empirical Rule 99.7% of the area under a normal curve is within ___ standard deviations of the mean.