# ASQ cqe practice test

## Quality Engineer Exam

##### Question 1

Given the data below, what is the 90% confidence interval for the variance?
22, 23, 19, 17, 29, 25

• A. 4.21 - 99.07
• B. 15.32 - 28.66
• C. 8.27 - 79.88
• D. 16.87 - 56.52

C

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##### Question 2

An experiment with two factors, in which all levels of one variable are run at each level of the second
variable, is called a

• A. One-way experiment.
• B. Latin square experiment.
• C. Factorial experiment.
• D. Fractional factorial experiment.

C

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##### Question 3

The primary advantage of the Latin square design, compared to the factorial design, is that

• A. In most circumstances, it requires less data.
• B. It eliminates the need for interaction analysis.
• C. It allows higher significance levels.
• D. It does not require homogeneity of variance.

A

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##### Question 4

The "least squares method" is used in

• A. The central limit theorem
• B. Calculating σ2
• C. Calculating σ2 and s2
• D. Calculating a best fit regression line.

D

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##### Question 5

The value for t, when making a two-tailed paired t test, with samples of 13 and alpha =0.05, is

• A. 1.782
• B. 2.179
• C. 2.064
• D. 1.711

B

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##### Question 6

In nonparametric statistics:
. No assumptions are made concerning the distribution from which the samples are taken.

. The parameters of the distribution do not relate to the parameters of the sample.

. The sample and the distribution must have no parameters in common.

• A. I only
• B. II only
• C. III only
• D. II and III only

A

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##### Question 7

The difference between setting alpha equal to 0.05 and alpha equal to 0.01 in hypothesis testing is

• A. With alpha equal to 0.05, we are more willing to risk a type I error.
• B. With alpha equal to 0.05, we are more willing to risk a type II error.
• C. Alpha equal to 0.05 is a more "conservative" test of the null hypothesis.
• D. With alpha equal to 0.05, we are less willing to risk a type I error.

A

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##### Question 8

One-way analysis of variance is MOST similar in its objectives to

• A. A test of a population mean.
• B. A test for equality of two sample proportions.
• C. A test for equality of two population means.
• D. A chi-square test for independence.

C

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##### Question 9

A two-way analysis of variance has r levels for one variable and c levels for the second variable with 2
observations per cell. The degree of freedom for interaction is

• A. 2(r)(c)
• B. (r-1)(c-1)
• C. rc-1
• D. 2(r-1)(c-1)

B

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##### Question 10

Which of the following is a valid null hypothesis?

• A. p > 1/8
• B. μ < 98
• C. The mean of population A is not equal to the mean of population B
• D. mu = 110