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Question:
Part (a):
An automotive expert claims that the large number of self-serve petrol stations has resulted in poor car maintenance, and that the average lyre pressure is at least 28 kilopascals below its manufacturers specification. As a quick test, 10 tyres are examined, and the number of kilopascals by which each tyre is below specification is recorded The resulting data (in kilopascals) are as follows:
48 62 14 0 34 41 21 34 55 62
Is there sufficient evidence, at a significance level of 5%, to support the expert's claim? State any assumptions that need to be made.
Part (b):
In the 2000 federal election, a candidate received 58% of the ballots cast. Four months later, a survey of 700 people revealed that 54% now supported the candidate. Is this sufficient evidence, at a significance level of 5%, to allow us to conclude that the candidate's popularity has decreased? State any assumptions that need to be made.
Formulate a linear program that can be used to determine the number of hours each graphic designer should be assigned to the project in order to minimize total cost. What is the total cost?
What is the probability that a randomly selected adult who is "certain" or has "little doubt" that God exists has no more than a high school education?
Mike has est that the store sells about 800 SONY sets annually. Estimated holding cost is $30 per set and ordering cost is $20 per order. Describe the inventory pattern graphically.
We then counted the number of statements in the summary that can be classed as inferences. Assume inferences are interval measurement.
The data in the following tables are some of the results of an Internal Revenue Service survey of taxpayers. Analyze and interpret the data.
The engineer in a widget factory wants to test out a new form of raw materials. So a batch of widgets are made in the old manner as a control group and then a batch are made with the new materials as a comparison.
From experience he knows that he can go another 15 miles. What is the probability that he will be stranded on the highway without gasoline?
Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance.
A movie theater owner wanted to know how many people hated commercial at the beginning of movies if less then 10% hated the commercials the he would leave them.
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
1the driver of a truck loaded with 900 boxes of books will be fined if the total weight of the boxes exceeds 36450
Suppose that you work for a newly restructured automotive company with nearly 100,000 employees. You are in charge of purchasing engines from an overseas supplier. Company policy is that you purchase several hundred engines each month to be placed in..
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