1. A sample of five price/earnings ratios for companies in the Services sector follows:
37 11 14 17 12
Estimate the population mean p/e ratio for the Services sector.

1.   ?    10.76
2.   ?    14
3.   ?    18
4.   ?    18.2
5.   ?    None of the above answers is correct.

A sample of five price/earnings ratios for companies in the Services sector follows:
37 11 14 17 12
Estimate the population standard deviation of the p/e ratios for the Services sector.

1.   ?    9.62
2.   ?    10.76
3.   ?    11.5
4.   ?    115.7
5.   ?    None of the above answers is correct.

A tire manufacturer would like to know what percentage of their company-owned store's customers' tires are underfilled. Over the next few months 100 vehicles are randomly chosen and a tire's pressure is recorded. Of the 100 tires chosen, 60 are underfilled. Estimate the population proportion of underfilled tires.

1.   ?    0.06
2.   ?    0.4
3.   ?    0.6
4.   ?    60 tires
5.   ?    None of the above answers is correct.

If samples of size 45 are chosen from a uniform distribution and the sample mean recorded, the sample means will take on the shape of which distribution?

1.   ?    Exponential
2.   ?    Normal
3.   ?    Uniform
4.   ?    Not enough information is given to answer this question.

A population has a mean of 75 and a standard deviation of 10. Samples of size 20 are chosen and the sample means recorded. What is the expected value of the sample mean?

1.   ?    2.236
2.   ?    10
3.   ?    75
4.   ?    Not enough information is given to answer this question.

A population has a mean of 75 and a standard deviation of 10. Samples of size 20 are chosen and the sample means recorded. What is the standard deviation of the sample means?

1.   ?    2.236
2.   ?    10
3.   ?    75
4.   ?    Not enough information is given to answer this question

A population has a mean of 75 and a standard deviation of 10. Samples of size 20 are chosen and the sample means recorded. What is the shape of the sample means?

1.   ?    Exponential
2.   ?    Normal
3.   ?    Uniform
4.   ?    Not enough information is given to answer this question.

Samples of size 81 are taken from a population of size 500 with mean 10 and standard deviation 3. Find the standard deviation of the sample means.

1.   ?    0.3054
2.   ?    0.3333
3.   ?    0.9163
4.   ?    3
5.   ?    None of the above

As population size increases, the value of the finite population standard deviation of the sample mean

1.   ?    decreases
2.   ?    gets closer to the infinite population standard deviation of the sample mean
3.   ?    both a and b
4.   ?    None of the above

The admissions office at a college reported that this year's freshman class had an average SAT score of 1103 with a standard deviation of 95. What is the probability that a sample of 40 students from this year's freshman class had an average score greater than 1120?

1.   ?    0.1292
2.   ?    0.3708
3.   ?    0.6292
4.   ?    0.8708
5.   ?    None of the above

The admissions office at a college reported that this year's freshman class had an average SAT score of 1103 with a standard deviation of 95. What is the probability that a sample of 40 students from this year's freshman class had an average score greater than 1100?

1.   ?    0.0793
2.   ?    0.4207
3.   ?    0.5793
4.   ?    0.9207
5.   ?    None of the above

40% of the employees at a large corporation are female. A sample of 50 employees is taken and gender is recorded. What is the expected value of the sample proportion of females in the sample?

1.   ?    0.0693
2.   ?    0.4
3.   ?    16
4.   ?    50
5.   ?    None of the above

40% of the employees at a large corporation are female. A sample of 50 employees is taken and gender is recorded. What is the probability of a sample proportion of females in the sample between .35 and .45?

1.   ?    0.0693
2.   ?    0.2642
3.   ?    0.5284
4.   ?    0.72
5.   ?    None of the above

If the expected value of a point estimator is equal to the population parameter, then the point estimator is known as consistent.

1.   ?    True
2.   ?    False

A sampling method in which one of the first k elements is selected and then every kth element thereafter is selected is known as

1.   ?    a. cluster sampling
2.   ?    b. random sampling
3.   ?    c. stratified sampling
4.   ?    d. systematic sampling
5.   ?    e. None of the above