Total Quality Management

261. The chi-square goodness-of-fit test can be used to test for:

  1. significance of sample statistics
  2. difference between population means
  3. normality
  4. probability
Correct answer: (C)
normality

262. What is the Sum of Squares of the interaction (AB)?

  1. 6.075
  2. 39.48
  3. 7.19
  4. 3.89
Correct answer: (D)
3.89

263. How many replicates of the experiment were performed?

  1. 1 Replicate
  2. 2 Replicates
  3. 3 Replicates
  4. 4 Replicates
Correct answer: (C)
3 Replicates

264. You conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n = 25 that do not lead to the rejection of Ho (null hypothesis). You calculate a p-value of 0.0667. What will happen to the p-value if you observe the same sample mean and standard deviation for a sample n>25?

  1. Increase
  2. Decrease
  3. Stay the same
  4. May either increase or decrease
Correct answer: (B)
Decrease

265. What does a beta of 0.478 mean?

  1. That the relationship between the independent and dependent variables is not linear
  2. That the regression is not significant
  3. That the correlation is significant
  4. This means that for every unit increase in your independent variable, your dependent variable increases by 0.478 units
Correct answer: (D)
This means that for every unit increase in your independent variable, your dependent variable increases by 0.478 units

266. Which of the following points are not true when conducting a multiple regression?

  1. Multiple regression can be used to assess quadratic relationships
  2. Data must be homogeneous for a multiple regression
  3. Data must be normally distributed for multiple regression
  4. Multiple regression can be used to assess linear relationships
Correct answer: (A)
Multiple regression can be used to assess quadratic relationships

267. Which of the following definitions is correct?

  1. An activity, which results in an outcome, is called an event.
  2. The probability of an event is expressed in decimal form ranging from -1 to +1.
  3. The sample space refers to all possible outcomes of an experiment.
  4. The probability that an event will occur is called the experiment.
Correct answer: (C)
The sample space refers to all possible outcomes of an experiment.

268. The discrete random variable X has the probability function (k is a constant): Answer question 8 - 10 based on the information given above. The value of k is:

  1. 1 point
  2. 1/18
  3. 1/12
  4. 1/6
Correct answer: (B)
1/18

269. The value of E[X] is:

  1. 52/18
  2. 28/9
  3. 52/9
  4. 28/18
Correct answer: (C)
52/9

270. A larger standard deviation for a normal distribution with an unchanged mean indicates that'the distribution becomes:

  1. narrower and more peaked
  2. flatter and wider
  3. more skewed to the right or left
  4. a change in the standard deviation does not change the shape of the distribution
Correct answer: (B)
flatter and wider
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