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An auditor wants to estimate what proportion of a banks commercial loan files are complete. The auditor randomly samples 60 files and finds 12 are incomplete. Using a 95% confidence interval, estimate the true proportion of incomplete files for ALL the banks commercial loans.
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
A confidence interval increases in width as:
John makes a mark on a straight stick that is 1 meter in length; you assign a uniform distribution to the location of the mark(uniform over the entire length of the stick). John cuts the stick at that mark, making two sticks.
A simple random sample of 36 bulbs yields a mean lifetime of 504 hours. Construct and interpret a 99% confidence interval for the mean lifetime of all such bulbs.
The 587th of the 731 trees in the preserve was selected as the first observation in the sample. What is the tree number of the second observation in the sample?
What is the probability of completing the exam in one hour or less (to 4 decimals)? What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes.
Surface area of a cube. The formula A = 6V^-2/3(-2/3 power) gives the surface area of a cube in the volume V. What is the volume of a cube with a surface area 12 square feet?
The ELISA test for AIDS was used in the screening of blood donations in the 1990s. As with most medical diagnostic tests, the ELISA test is not infallible.
Prepare a 10-13-question survey to gather primary data regarding your selected problem statement. Please note that you will not administer this survey as part of this assignment.
Consider the experiment of rolling a pair of dice. Suppose that we are interested in the sum of the face values showing on the dice.
What is overall mean and standard deviation of the test scores? Sketch the distribution and show where you are and where your friend is?
Which of given is the correct decision statement for test?
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