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Question: The college of business at a state university has a computer literacy requirement for all graduates. Students must show proficiency with a computer spreadsheet software package and with a word-processing software package. To assess whether students are computer literate, a test is given at the end of each semester. The test is designed so that at least 70% of all students who have taken a special microcomputer course will pass. The college does not wish to declare that fewer than 70% of the students pass the test unless there is strong sample evidence to indicate this. Suppose that, in a random sample of 100 students who have recently finished the microcomputer course, 63 pass the proficiency test.
a. Using a significance level of 0.05, what conclusions should the administrators make regarding the difficulty of the test?
b. Describe a Type II error in the context of this problem.
Determine the range of values containing 50% of the population of x. From a large sampling (N>5000), we find that x has a mean value of 5.2 units and a standard deviation of 1.0 units.
A building contractor claims he can renovate a 300 square foot kitchen and dining room in 40 work hours plus or minus 5 hours (i.e. The mean and standard deviation respectively)
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated?
there are 2 groups of education majors. they are all assigned to study a diverse neighborhood where their internship
Construct a cause-and-effect diagram for automobile accidents. Conduct a failure mode and effects criticality analysis and comment on areas of emphasis for prevention of accidents.
the time in hours for a worker to repair an electrical instrument is a normally distributed random variable with a mean
In textile industry, a manufacturer is interested in the number of blemishes or flaws occurring in each 100 feet of material. Of the following probability distributions, the one that most applies to this situation is the.
Calculate the appropriate measure to estimate the percent defective. Find UCL and LCL. Show your work
An experiment consists of making 80 telephone calls in order to sell a particular insurance policy.
A random sample of 168 students was asked how many songs were in their digital music li- brary and what fraction of them was legally purchased. Overall, they reported having a total of 117,079 songs, of which 23.1% were legal. The music industry w..
in a study subjects are randomly assigned to one of three groups control experimental a or experimental b. after
The acidity of water draining from a coal mine is often controlled by adding lime to the water. A valve controls the lime addition and a sensor is downstream. For the model of the system shown in Figure AP9.6, determine K and the distance D to mai..
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