Reference no: EM131365331
Statistical concepts/ Deviation
Question 1. Find the standardized variable z if x has Mean 12 and standard deviation 10. Z = (x-10)/12
Z = (x-12)/10
Z = (12-x)/10
Z = (x+12)/10
Question 2. Find the area under the standard normal curve to the right of z = 1.55. Round to four decimal places.
.9394
.9505
.0606
.0485
Question 3. Find the area under the standard normal curve to the left of z = 2.33
.0099
.0102
.9901
.4901
Question 4. Find the area under the standard normal curve over the interval z = -0.44 to z = 0.44. Compute probabilities using the standard normal table in Appendix B (Table 3). Round the answer to four decimal places.
0.3300
0.3400
0.3500
0.3600
Question 5. Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 550 and a standard deviation of 100. Find the probability that a student will score over 680. Round your answer to four decimal places.
0.1587
0.0968
0.1459
0.9032
Question 6. Scores on a certain nationwide college entrance examination follow a normal distribution with a mean of 600 and a standard deviation of 100. Find the probability that a student will score between 410 and 700. Round your answer to four decimal places.
0.9635
0.7826
0.8347
0.8126
Question 7. A population has mean 70 and standard deviation 15. Calculate mean of x bar for a random sample of size 20.
15
3.5
.75
70
Question 8. A population has mean 37 and standard deviation 6. Calculate the standard deviation of x bar for a random sample of size 29.
1.1
1.3
.8
1.6
Question 9. Suppose the weights of packages of lettuce coming off a packaging line have a normal distribution with mean 8.4 ounces and standard deviation 0.4 ounce. If every package is labeled 9.2 ounces, what proportion of the packages weigh less than the labeled amount?
76%
84%
98%
87%
Question 10. Suppose the weights of the contents of cans of mixed nuts have a normal distribution with mean 32.4 ounces and standard deviation 0.4 ounce.
If two packages are randomly selected, what is the probability that the average weight is less than 32 ounces?
1.7%
7.9%
7.1%
2.5%
|
Discuss about the scope creep
: Describe a previous project in which you were involved, where scope creep occurred. Explain why it occurred and at least one (1) way it could have been prevented.
|
|
Overlapping project phases
: "Generally, projects are planned by developing phases that are performed sequentially. In some cases, it is necessary to accelerate the project life cycle by overlapping project phases. Which of the following best describes this technique?"
|
|
Why is oxide charge undesirable
: Sketch the energy band diagrams of an MOS capacitor with N-type silicon substrate and N+ poly-Si gate at !latband, in accumulation. in depletion, at threshold. and in inversion.
|
|
How can a marketer use knowledge of consumer behaviour
: How can a marketer use knowledge of consumer behaviour to develop financial services for affluent consumers? For lower-income consumers?
|
|
Find the area under the standard normal curve
: Find the area under the standard normal curve to the right of z = 1.55. Round to four decimal places. Find the area under the standard normal curve to the left of z = 2.33.
|
|
Define a work breakdown structure
: As the project manager for an IT department, you have been assigned to manage the project of deploying a new VoIP phone system to the company's campus. The campus consists of three (3) different buildings, each with twenty to fifty (20 to 50) work..
|
|
Social class difference influence product lines and style
: How do social-class differences influence each shop's product lines and styles, advertising media selection, communications style used in the advertisements and payment policies?
|
|
Escalation of commitment cycle
: What are some key strategies a manager can use to avoid the escalation of commitment cycle? How can these strategies be applied to the decision-making task?
|
|
Find the threshold voltage of this transistor
: Is the CV characteristic obtained at high frequency or low frequency? Or. is it impossible to determine? Explain.
|