143 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic i
题目
143 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A. 1.4"
B. 1.2".
C. 1.0"
D. 0.8"
E. 0.2"
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参考答案和解析
更多“143 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic i”相关问题
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第1题：
Two sources of variation in the length of hex bolts exist. Production variation and measurement error. The QC manager knows that the standard deviation from these sources is 0.24" and 0.43" , respectively. What is the total standard deviation.
A . .10 inch.
B . .19 inch.
C . .34 inch.
D . .49 inch.
E . .67 inch.
正确答案：D
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第2题：
Standard deviation of project completion is _____ .
A a relationship of the uncertainty of critical path activities.
B an indicator of project end date target confidence
C a function of critical path, leveling and project costs.
D A and B
E All of the above.
正确答案：D
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第3题：
147 A process characteristic has a true mean of 150 and a true standard deviation of 20. A sample of 25 items is taken from this process. The standard error of the estimate is:
A. 0.2
B. 0.8
C. 4
D. 5
E. 7.5
正确答案：C
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第4题：
200 The specification for a particular part is 10" + or - 0.015". The standard associated process produces parts with a means of 10" and standard deviation of 0.002'. The process capability index is: A. 0.002
B. 1.0
C. 2.5
D. 7.5
E. None of the above
正确答案：C
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第5题：
123 Using the problem stated in the Special window, Calculate the deviation of duration for the task, using the PERT concept of standard deviation of task duration.
A. 0.5
B. 1.0
C. 1.8
D. 2.2
E. 2.8
正确答案：C
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第6题：
When an azimuth of the Sun has been taken and the deviation of the standard magnetic compass computed，the watch officer should record the results ______.
A.in the vessel's Official Logbook
B.on the compass deviation card
C.in the compass deviation log
D.on a Napier diagram
正确答案：C
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第7题：
Compass error is equal to the ______.
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
正确答案：C
罗经差等于磁差和自差的结合。 -
第8题：
A.mean
B.variance
C.percentile
D.standard deviation
E.coefficient of variation求偏态分布资料的正常值范围时，应计算答案：C解析： -
第9题：
Dense Urban环境下，Shadowing Standard Deviation通常选择（）dB。
- A、6
- B、7
- C、8
- D、10
正确答案:C -
第10题：
Rural环境下，Shadowing Standard Deviation通常选择（）dB
- A、6
- B、7
- C、8
- D、10
正确答案:A -
第11题：
问答题Kara attends a university where students study for an average (arithmetic mean) of 13.4 hours per week. How many hours per week does Kara study? (1) The standard deviation of study time at Kara’s school is 2.8. (2) Kara’s study time is one standard deviation away from the mean.正确答案： E解析：
（1）条件告诉了Kara学校学生学习时间的总标准差，无法计算Kara的学习时间数值；（2）条件指出Kara的学习时间距离平均数有两个标准差区间，不能确定其是高于还是低于平均值，故本题应选E项。 -
第12题：
单选题If the set S is composed of the following numbers {99, 100, 100, 105, 106, 116, 123}, which of the following is largest?AThe average (arithmetic mean) of set S
BThe median of set S
CThe mode of set S
DThe range of set S
EThe standard deviation of set S
正确答案： B解析：
根据公式可知，A项S数集的平均数=107，B项S数集的中位数=105，C项S数集的众数=100，D项S数集的极差=24，E项S数集的标准差≈9，故本题选A项。 -
第13题：
For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A . 1.4"
B . 1.2".
C . 1.0"
D . 0.8"
E . 0.2"
正确答案：C
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第14题：
Amount at Stake is the _____ .
A function of planned time/real time project costs.
B risk identified in successful project completions.
C (Standard Project Deviation + Expected Costs)/6
D cost of investment loss + least cost to restore status quo.
E inherent risk at conception altered by standard project deviations.
正确答案：D
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第15题：
130 Standard deviation of project completion is _____ .
A. a relationship of the uncertainty of critical path activities.
B. an indicator of project end date target confidence
C. a function of critical path, leveling and project costs.
D. A and B
E. All of the above
正确答案：D
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第16题：
25 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A. 1.4"
B. 1.2".
C. 1.0"
D. 0.8"
E. 0.2"
正确答案：C
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第17题：
Rural环境下，Shadowing Standard Deviation通常选择()dB
A6
B7
C8
D10
答案：A
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第18题：
Your vessel is proceeding down a channel，and you see a pair of range lights that are in line dead ahead．The chart indicates that the direction of this pair of lights is 229°T，and variation is 6°W．If the heading of your vessel at the time of the sighting is 232°per standard magnetic compass，what is the correct deviation ________．
A.3°E
B.9°E
C.3°W
D.9°W
正确答案：A
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第19题：
A.mean
B.variance
C.percentile
D.standard deviation
E.coefficient of variation表示正态分布资料中的集中趋势最好采用答案：A解析： -
第20题：
在CNP1中，无线传播模型校正完成后，评估模型校正精度的指标有MeanError和Standard Deviation
正确答案:正确 -
第21题：
standard deviation
正确答案: 标准差，常用来描述数据离散趋势的统计指标，其能反映均数代表性的好坏，以及变量值与均数的平均离散程度。 -
第22题：
求偏态分布资料的正常值范围时，应计算（）
- A、mean
- B、variance
- C、percentile
- D、standard deviation
- E、coefficient of variation
正确答案:C -
第23题：
单选题The principal purpose of magnetic compass adjustment is to（）.Areduce the variation as much as possible
Breduce the deviation as much as possible
Creduce the magnetic dip as much as possible
Dallow the compass bowl to swing freely on its gimbals
正确答案： A解析： 暂无解析