. If X~ N(50,4), the practical range of X values is x R

True

False

2. For a standard normal distribution, the mean equals 0 and the variance equals 1.

True

False

3. In a normal distribution all outcomes are equally likely.

True

False

4. A continuous normal approximation of a discrete binomial probability distribution becomes accurate as the sample (the number of trials) becomes larger.

True

False

5. For a standard normal distribution, P(z < 0) = 0.5

True

False

6. Use empirical rules to estimate the shaded area under the normal curve shown below

82%

95%

68%

79%

Other:

7. Only for a standard normal distribution is the area under the PDF curve equal to 1.

True

False

8. For any continuous probability distribution the estimations of P(X < x) and P(X x) are equivalent.

True

False

9. Parameters of which binomial distribution listed below do not allow the use of normal approximation?

n=50 and p=0.4

n=40 and p=0.25

n=45 and p=0.9

n=40 and p=0.8

Other:

10. Calculate the mean and standard deviation for the normal approximation to the binomial distribution with n = 300 and p = 0.4

=50 and =8.49

=72 and =8.49

=120 and =72

=120 and =0.24

Other:

11. The standard deviation in this distribution is 2.

True

False