1. Let Zbe a normal random variable with a mean of 0 and a standard deviation of 1. Determine P(Z 1.40).

Select one:

• 0.8508
• 0.0808
• 0.9192
• 0.4192

2 Random samples of size 25 are drawn from a population with mean= 4 and standard deviation= 2. The standard error of the sampling distribution of the sample mean is equal to

Select one:

• 2
• 0.4
• 0.16
• 4

3. Let the random variableZfollow a standard normal distribution. Find the value ofksuch thatP(Zk) = 0.3897.

Select one:

• 0.28
• 0.28
• 1.22
• 0.3483

4. A random sample of size n = 25 is taken from a normal population with mean= 4 and standard deviation= 2. Find the probability that the sample mean will be less than 5.

Select one:

• 0.9938
• 0.6915
• 0.4938
• 0.0062

5. The area to the right of z = 1.32 and under the standard normal distribution is

Select one:

• 0.0968
• 0.9066
• 0.0934
• 0.4066