预防医学与公共卫生学
相似问题和答案
第1题：
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
第2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"
第3题：
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
C . 1.8
D . 2.2
E . 2.8
第4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
第5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.
第6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.
第7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.
第8题：
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
C . 2.5
D . 7.5
E . None of the above
第9题：
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"
第10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