McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering , Electronics and Communication Engineering .
| 301. |
A null hypothesis is rejected if the value of a test statistic lies in the: |
| A. | Rejection region |
| B. | Acceptance region |
| C. | Both (a) and (b) |
| D. | Neither (a) nor (b) |
| Answer» A. Rejection region | |
| 302. |
The chi-square goodness-of-fit test can be used to test for: |
| A. | significance of sample statistics |
| B. | difference between population means |
| C. | normality |
| D. | probability |
| Answer» C. normality | |
| 303. |
What do ANOVA calculate? |
| A. | Z-scores |
| B. | F ratios |
| C. | Chi square |
| D. | T-scores |
| Answer» B. F ratios | |
| 304. |
To determine whether the test statistic of ANOVA is statistically significant, it can be compared to a critical value. What two pieces of information are needed to determine the critical value? |
| A. | Sample size, number of groups |
| B. | Mean, sample standard deviation |
| C. | Expected frequency, obtained frequency |
| D. | MSTR The treatment mean square (MSTR), Mean Square Error (MSE) |
| Answer» A. Sample size, number of groups | |
| 305. |
In a study, subjects are randomly assigned to one of three groups: control, experimental A, or experimental B. After treatment, the mean scores for the three groups are compared. The appropriate statistical test for comparing these means is: |
| A. | the correlation coefficient |
| B. | chi square |
| C. | the t-test |
| D. | the analysis of variance |
| Answer» D. the analysis of variance | |
| 306. |
If the F-Value calculated from the data is 0.9, the result is statistically significant |
| A. | Always |
| B. | Sometimes |
| C. | Never |
| D. | Illogical Question |
| Answer» C. Never | |
| 307. |
Which statement is true of an experiment of factorial design? |
| A. | Independence or orthogonality is unaffected by the sizes of the participant samples in the various treatment combinations. |
| B. | There are always at least two control groups. |
| C. | Control over an independent variable is achieved by orthogonal variation with respect to the other independent variables. |
| D. | There is always a single control group. |
| Answer» C. Control over an independent variable is achieved by orthogonal variation with respect to the other independent variables. | |
| 308. |
What would the levels of the independent variables be for a two-way ANOVA investigating the effect of four different treatments for depression and gender? |
| A. | 4 and 1 |
| B. | 2 |
| C. | 4 and 2 |
| D. | 6 |
| Answer» C. 4 and 2 | |
| 309. |
In ANOVA, a factor is defined as the: |
| A. | Dependent variable. |
| B. | Independent variable. |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» A. Dependent variable. | |
| 310. |
A 2 X 2 factorial design |
| A. | Is called a one-way ANOVA. |
| B. | Results in a four-cell matrix. |
| C. | Cannot yield interactions. |
| D. | Must include an organism independent variable. |
| Answer» B. Results in a four-cell matrix. | |
| 311. |
Which of the following distributions is suitable to model the length of time that elapses before the first employee passes through the security door of a company? |
| A. | Exponential |
| B. | Normal |
| C. | Poisson |
| D. | Binomial |
| Answer» A. Exponential | |
| 312. |
Smaller p-values indicate more evidence in support of: |
| A. | the null hypothesis |
| B. | the alternative hypothesis |
| C. | the quality of the researcher |
| D. | further testing |
| Answer» B. the alternative hypothesis | |
| 313. |
Analysis of variance is a statistical method of comparing the ______________ of several populations. |
| A. | standard deviations |
| B. | variances |
| C. | means |
| D. | proportions |
| Answer» C. means | |
| 314. |
If the Mean Square Error MSE of an ANOVA for six treatment groups is known, you can compute |
| A. | degrees of freedom, df1 |
| B. | the standard deviation of each treatment group |
| C. | the pooled standard deviation |
| D. | all answers are correct |
| Answer» C. the pooled standard deviation | |
| 315. |
In a study, subjects are randomly assigned to one of three groups: control, experimental A, or experimental B. After treatment, the mean scores for the three groups are compared. The appropriate statistical test for comparing these means is: |
| A. | the correlation coefficient |
| B. | chi square |
| C. | the t-test |
| D. | the analysis of variance |
| Answer» D. the analysis of variance | |
| 316. |
If the F-Value calculated from the data is 5.0, the result is statistically significant |
| A. | Always |
| B. | Sometimes |
| C. | Never |
| D. | Illogical Question |
| Answer» B. Sometimes | |
| 317. |
What is the Effect of Memory (MIPS)? |
| A. | 40 |
| B. | 20 |
| C. | 10 |
| D. | 5 |
| Answer» B. 20 | |
| 318. |
Which of these characterizes a factorial design? |
| A. | One in which there is a single independent variable. |
| B. | One in which there is more than one independent variable |
| C. | One in which the researcher wants to investigate the interactions between variables |
| D. | Both B and C |
| Answer» D. Both B and C | |
| 319. |
What statistic is used to check the significance of the Kruskal-Wallis test? |
| A. | Mean rank |
| B. | Partial |
| C. | t-value |
| D. | Chi squared |
| Answer» D. Chi squared | |
| 320. |
What is the appropriate statistical test for a factorial design? |
| A. | the Modes test |
| B. | ANOVA |
| C. | t-test |
| D. | chi-square |
| Answer» B. ANOVA | |
| 321. |
Give the F test for the interaction effect of factors A and B. |
| A. | F = (SSABB )/MSE |
| B. | F = (SSA)/MSE + (SSB)/MSE |
| C. | F = (MSA)/MSE + (MSB)/MSE |
| D. | F = (MSAB)/MSE |
| Answer» D. F = (MSAB)/MSE | |
| 322. |
The Kruskal-Wallis is based upon the ______________ test. |
| A. | Pearson's r |
| B. | Wilcoxon |
| C. | Mann Whitney |
| D. | Friedman |
| Answer» C. Mann Whitney | |
| 323. |
In a factorial experiments, we |
| A. | test one factor at a time |
| B. | cannot estimate interactions |
| C. | test all possible combination of factor levels are tested |
| D. | all of these |
| Answer» C. test all possible combination of factor levels are tested | |
| 324. |
What is the Variation due to Memory? |
| A. | 84% |
| B. | 76% |
| C. | 19% |
| D. | 5% |
| Answer» B. 76% | |
| 325. |
In a factorial design, a(an) ______________ between independent variables indicates that the effect of one independent variable is different at different levels of the other independent variable. |
| A. | main effect |
| B. | factorial effect |
| C. | interaction |
| D. | moderation |
| Answer» C. interaction | |
| 326. |
What is the Sum of Squares of the interaction (AB)? |
| A. | 6.075 |
| B. | 39.48 |
| C. | 7.19 |
| D. | 3.89 |
| Answer» D. 3.89 | |
| 327. |
How many replicates of the experiment were performed? |
| A. | 1 Replicate |
| B. | 2 Replicates |
| C. | 3 Replicates |
| D. | 4 Replicates |
| Answer» C. 3 Replicates | |
| 328. |
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? |
| A. | Increase |
| B. | Decrease |
| C. | Stay the same |
| D. | May either increase or decrease |
| Answer» B. Decrease | |
| 329. |
What does a beta of 0.478 mean? |
| A. | That the relationship between the independent and dependent variables is not linear |
| B. | That the regression is not significant |
| C. | That the correlation is significant |
| D. | This means that for every unit increase in your independent variable, your dependent variable increases by 0.478 units |
| Answer» D. This means that for every unit increase in your independent variable, your dependent variable increases by 0.478 units | |
| 330. |
Which of the following points are not true when conducting a multiple regression? |
| A. | Multiple regression can be used to assess quadratic relationships |
| B. | Data must be homogeneous for a multiple regression |
| C. | Data must be normally distributed for multiple regression |
| D. | Multiple regression can be used to assess linear relationships |
| Answer» A. Multiple regression can be used to assess quadratic relationships | |
| 331. |
Which of the following definitions is correct? |
| A. | An activity, which results in an outcome, is called an event. |
| B. | The probability of an event is expressed in decimal form ranging from -1 to +1. |
| C. | The sample space refers to all possible outcomes of an experiment. |
| D. | The probability that an event will occur is called the experiment. |
| Answer» C. The sample space refers to all possible outcomes of an experiment. | |
| 332. |
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: |
| A. | 1 point |
| B. | 1/18 |
| C. | 1/12 |
| D. | 1/6 |
| Answer» B. 1/18 | |
| 333. |
A larger standard deviation for a normal distribution with an unchanged mean indicates that ‘the distribution becomes: |
| A. | narrower and more peaked |
| B. | flatter and wider |
| C. | more skewed to the right or left |
| D. | a change in the standard deviation does not change the shape of the distribution |
| Answer» B. flatter and wider | |
| 334. |
When the k population means are truly different from each other, it is likely that the average error deviation: |
| A. | Is relatively large compared to the average treatment deviations. |
| B. | Is relatively small compared to the average treatment deviations. |
| C. | Is about equal to the average treatment deviation. |
| D. | Differ significantly between at least two of the populations. |
| Answer» B. Is relatively small compared to the average treatment deviations. | |
| 335. |
______________ designs are research designs with more than one independent variable. |
| A. | Simple |
| B. | Monotonic |
| C. | Factorial |
| D. | Multi |
| Answer» C. Factorial | |
| 336. |
What statistical procedure is used to assess the statistical significance of the main effects and the interaction(s) in a factorial design? |
| A. | t-test |
| B. | correlation |
| C. | analysis of covariance |
| D. | analysis of variance |
| Answer» D. analysis of variance | |
| 337. |
In a factorial design, a(an) ______________ between independent variables indicates that the effect of one independent variable is different at different levels of the other independent variable. |
| A. | main effect |
| B. | factorial effects |
| C. | interaction |
| D. | collaboration |
| Answer» C. interaction | |
| 338. |
Scatter diagrams show the relationship between: |
| A. | Two variables |
| B. | The dependent variable along the y axis |
| C. | The dependent variable along the x axis |
| D. | None of these |
| Answer» A. Two variables | |
| 339. |
How would an interaction be indicated in a line graph? 2/5 |
| A. | as parallel lines |
| B. | as intersecting lines |
| C. | as overlapping lines |
| D. | as diagonal lines |
| Answer» B. as intersecting lines | |
| 340. |
What is the Effect of Cache (MIPS)? |
| A. | 40 |
| B. | 20 |
| C. | 10 |
| D. | 5 |
| Answer» C. 10 | |
| 341. |
What is the Variation due to Interaction? |
| A. | 84% |
| B. | 76% |
| C. | 19% |
| D. | 5% |
| Answer» D. 5% | |
| 342. |
Dr. AB is designing a 3 x 7 factorial experiment. Which of the following is true about AB's study? |
| A. | Dr. AB has 21 subjects. |
| B. | Dr. AB's study has 2 independent variables: one with 3 levels and one with 7 levels |
| C. | Dr. AB's study has 21 independent variables. |
| D. | Dr. AB's study has 3 independent variables: one with 3 levels, one with 7 levels, and one with 21 levels. |
| Answer» B. Dr. AB's study has 2 independent variables: one with 3 levels and one with 7 levels | |
| 343. |
How many levels were used for factor B? |
| A. | 1 Level |
| B. | 2 Levels |
| C. | 3 Levels |
| D. | 4 Levels |
| Answer» C. 3 Levels | |
| 344. |
This means that for every unit increase in your independent variable, your dependent variable increases b 0.478 units What degrees of freedom do you report in a multiple regression? |
| A. | Residual degree of freedom |
| B. | Error and residual degree of freedom |
| C. | Regression and residual degrees of freedom |
| D. | Adjusted R squared and regression degrees of freedom |
| Answer» C. Regression and residual degrees of freedom | |
| 345. |
Our forecasted value of y is |
| A. | 7 |
| B. | 9 |
| C. | 25 |
| D. | impossible to determine |
| Answer» B. 9 | |
| 346. |
To determine whether the test statistic of ANOVA is statistically significant, it can be compared to a critical value. What two pieces of information are needed to determine the critical value? |
| A. | Sample size, number of groups |
| B. | Mean, sample standard deviation |
| C. | Expected frequency, obtained frequency |
| D. | MSTR The treatment mean square (MSTR), Mean Square Error (MSE) |
| Answer» A. Sample size, number of groups | |
| 347. |
The mean square is the sum of squares divided by |
| A. | the total number of observations |
| B. | its corresponding degrees of freedom - 1 |
| C. | its corresponding degrees of freedom |
| D. | none of these |
| Answer» C. its corresponding degrees of freedom | |
| 348. |
Malcolm Baldrige national quality award is for (MBNQA) |
| A. | Total Quality Management |
| B. | International Standard Organization |
| C. | Total Productive Maintenance |
| D. | Total Quality Control |
| Answer» A. Total Quality Management | |
| 349. |
Which of the following is responsible for quality objective? |
| A. | Top level management |
| B. | Middle level management |
| C. | Frontline management |
| D. | All of the above |
| Answer» A. Top level management | |
| 350. |
Service Assurance is |
| A. | Confidence with customer |
| B. | Customer has trust |
| C. | Employee has knowledge |
| D. | All of the above |
| Answer» D. All of the above | |
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