Distribution Basics - Practitioner's Exam

	Distribution Basics - Practitioner's Exam

Ten units are placed on a test stand. Failures occur after 5.2 hours, and 7.9 hours. Testing is stopped after 12 hours. This is an example of
Single censoring
A random sample
Multiple censoring
None of the above
Fifteen units are placed on a test stand. After the 3rd unit fails testing is ended. This is an example of
Multiple censoring
Time censoring
Type II censoring
None of the above
Fifteen units are placed on a test stand. After the 100 days testing is ended. This is an example of
Multiple censoring
Time censoring
Type II censoring
None of the above
The area of the shaded region in the figure below represents
The probability of a single item, chosen randomly having a length of 169
The number of items in the population with a length less than 169
The average probability of an item having a length of less than 169
The probability of a single item, chosen randomly having a length of less than 169
The figure above is best described as
A probability density function
A cumulative distribution function
A probability function
A cumulative density function
The figure below is best described as
A probability density function
A cumulative distribution function
A probability function
A cumulative density function
The reliability function
Is the same as the probability density function
Is equal to the area beneath the probability density function to the right of the value on the x-axis
Is equal to the height of the probability density function to the right of the value on the x-axis
Is the inverse of the cumulative distribution function
Which function is a measure of the tendency to fail?
probability density function
failure rate function
reliability function
hazard function
Which function displays the instantaneous failure rate?
probability density function
failure rate function
reliability function
hazard function
The mean of a discrete or continuous distribution is
the point where 50% of the values are to the right and 50% are to the left
its center of gravity
the point where most of the values occur
all of the above
Which of the following is true concerning the figure below?
the population represented by the solid line has a higher probability than the distribution represented by the dashed line
the population represented by the solid line has less variance than the distribution represented by the dashed line
the population represented by the solid line has a higher skewness than the distribution represented by the dashed line
all of the above are true
Which of the following is true concerning the figure below?
the skewness is positive
it is right skewed
the variance is positive
all of the above are true