大学MOOC Design and Analysis of Experiments(East China Normal University)1458197165 最新慕课完整章节测试答案
Chapter 1 Introduction
文章目录
Chapter 1 Test
1、单选题：
Which of the following method should we use when dealing with experiments with more than one factor?
选项：
A: Best-guess
B: Factorial experiment
C: One-factor-at-a-time
D: Blocking
答案: 【 Factorial experiment】
2、单选题：
Which of the following is not a common experimental strategy?
选项：
A: Best-guess
B: Quantitative analysis
C: One-factor-at-a-time
D: Factorial experiment
答案: 【 Quantitative analysis】
3、单选题：
Statistical methods often assume that the observations (or errors) are independently distributed random variables. Which of the following strategy makes this assumption valid.
选项：
A: Replication
B: Repeated measurement
C: Blocking
D: Randomization
答案: 【 Randomization】
4、单选题：
Which of the following strategy can make the best use of experimental data?
选项：
A: One-factor-at-a-time
B: Best-guess
C: Factorial experiment
D: Replication
答案: 【 Factorial experiment】
5、多选题：
Which of the following can be achieved by using blocking principle?
选项：
A: To obtain an estimate of the experimental error
B: To increase the accuracy of the experiment
C: To reduce or eliminate the variability transmitted from nuisance factors
D: To balance out any material or experimental unit effect
答案: 【 To increase the accuracy of the experiment;
To reduce or eliminate the variability transmitted from nuisance factors】
6、多选题：
During the following potential design factors, whose effect are relatively small?
选项：
A: Design factors
B: Held-constant factors
C: Allowed-to-vary factors
D: Controllable factors
答案: 【 Held-constant factors;
Allowed-to-vary factors】
7、判断题：
By randomization, we can compensate for the effect of nuisance factors.
选项：
A: 正确
B: 错误
答案: 【 错误】
8、判断题：
The fractional factorial experiment interprets the most straightforwardly.
选项：
A: 正确
B: 错误
答案: 【 错误】
9、判断题：
Replication reflects sources of variability only within runs.
选项：
A: 正确
B: 错误
答案: 【 错误】
10、判断题：
Experiments are used to study the performance of a process or system.
选项：
A: 正确
B: 错误
答案: 【 正确】
Chapter 2 Simple comparative experiments
Chapter 2 Test
1、单选题：
In the two-sample t test, the null hypothesis is that the two samples are equal, and the alternative hypothesis is that the two samples are not equal, and the significance level is α. What quantile should the test statistic t0 be compared with?
选项：
A: the upper α/2 percentage point of the t distribution with n1+n2-1 degrees of freedom
B: the upper α/2 percentage point of the t distribution with n1+n2-2 degrees of freedom
C: the lower α/2 percentage point of the t distribution with n1+n2-1 degrees of freedom
D: the lower α/2 percentage point of the t distribution with n1+n2-2 degrees of freedom
答案: 【 the upper α/2 percentage point of the t distribution with n1+n2-2 degrees of freedom】
2、单选题：
If 
is a random sample from the 
distribution, then 
(sum of squares of deviations divided by the variance）follows
选项：
A: Chi-square distribution with n-1 degrees of freedom
B: Chi-square distribution with n degrees of freedom
C: Normal distribution with mean 0 and variance 1
D: Normal distribution with mean μ and variance 1
答案: 【 Chi-square distribution with n-1 degrees of freedom】
3、单选题：
In semiconductor manufacturing, wet chemical etching is often used to remove silicon from the backs of wafers prior to metalization. The etch rate is an important characteristic of this process. Two different etching solutions are being evaluated. Eight randomly selected wafers have been divided into two pieces and etched in each solution, and the observed etch rates (in mils/min) are as follows.
solution 1：9.9，9.4，10.0，10.3，10.6，10.3，9.3，9.8
solution 2：10.2，10.0，10.7，9.5，10.2，9.6，9.4，10.3
Test hypothesis 
, then when performing paired t-test, the test statistic 
is equal to:
选项：
A: 0.169
B: -0.169
C: 0.178
D: -0.178
答案: 【 -0.178】
4、单选题：
When the degree of freedom k is greater than what, the t distribution has mean value μ = 0, and variance σ2 = k/(k-2)?
选项：
A: 1
B: 2
C: 3
D: 4
答案: 【 2】
5、单选题：
In the normal probability plot, if the data follow a normal distribution, the plotted points will fall approximately along ( ).
选项：
A: A straight line
B: A parabola
C: Normal distribution curve
D: t distribution curve
答案: 【 A straight line】
6、单选题：
In the paired t test, there are n observations for each sample, by blocking or pairing we have effectively "lost" ( ) degrees of freedom.
选项：
A: n
B: n-1
C: n+1
D: n-2
答案: 【 n-1】
7、多选题：
Which of the following distributions are symmetric?
选项：
A: Normal distribution
B: Chi-square distribution
C: t distribution
D: F distribution
答