QUESTION 29
A normal (Gaussian) distribution curve is

QUESTION 30
As the scatter of points about a regression line becomes less, r2 will

QUESTION 31
Given that the population standard deviation is 6.8, what sample size is required to be 90% confident that the estimated mean has an error less than 0.02?

QUESTION 32
When used together for variables data, which of the following pair is the MOST useful in preparing control charts?

QUESTION 33
Which of the following list of basic NDT techniques are X ray types?

QUESTION 34
What percentage of the area under the standard normal curve is included within (+/-) 1.5 standard deviations from 0?

QUESTION 35
Which of the following statements describes discrete data?

QUESTION 36
Four ingredients are blended to make a final product. Using the data below, what is the expected weight and variation of the final product?
Ingredient A 70 +- 3.00 grams
Ingredient B 20 +- 1.73 grams
Ingredient C 15 +- 1.73 grams
Ingredient D 10 +– 1.00 grams

QUESTION 37
One-way analysis of variance is MOST similar in its objectives to

QUESTION 38
Which of the following control charts are more efficient than an X-bar chart at detecting small shifts in the mean?
I. CUSUM.
II. EWQR.
III. EWMA.

QUESTION 39
What is the standard deviation of the following data?
3.2, 3.1, 3.3, 3.3, 3.1

QUESTION 40
The power of efficiency in designed experiments lies in the

QUESTION 41
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

QUESTION 42
The primary advantage of the Latin square design, compared to the factorial design, is that

QUESTION 43
Which of the following is NOT a method for customer service data collection?

QUESTION 44
How many outcomes are possible when performing a single trial of a binomial experiment?

QUESTION 45
One-way analysis of variance is MOST similar in its objectives to

QUESTION 46
Which of the following is NOT a statistical level of measurement?