Reference no: EM13995635
1. For a given sample size, the standard error of the sample mean is 10 grams. With other factors unchanged, to what extent must the sample size be increased if the standard error of the sample mean is to be just 5 grams?
2. Employees at a corporate headquarters own an average of 240 shares of the company's common stock, with a standard deviation of 40 shares. For a simple random sample consisting of 5 employees, what assumption would be required if we are to use the stan- dard normal distribution in determining P(}x $ 220)?
3. The manufacturer of a travel alarm clock claims that, on the average, its clocks deviate from perfect time by 30 seconds per month, with a standard deviation of 10 seconds. Engineers from a consumer magazine purchase 40 of the clocks and find that the average clock in the sample deviated from perfect accuracy by 34 seconds in one month.
a. If the manufacturer's claim is correct (i.e., µ, 5 30 seconds, a 5 10 seconds), what is the probability that the average deviation from perfect accuracy would be 34 seconds or more?
b. Based on your answer to part (a), speculate on the possibility that the manufacturer's claim might not be correct.
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Problem regarding the requisite decision model
: 1. Explain how modeling is used in decision analysis. What is meant by the term "requisite decision model"? 2. What role do subjective judgments play in decision analysis?
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What is your total yield on the bond when you sell it
: Five years ago, you bought a brand new bond with a maturity equal to 20 years. It pays an 8% coupon. When you bought it five years ago it was at a discount because at the time, the market rate on a similar bond was 9%. The market rate is now 7% an..
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Problem regarding the consumer relations representative
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What is the sample proportion
: a. What is the sample proportion, p 5 proportion of contacts that resulted in a sale being made? b. For simple random samples of this size, what is the probability that p # 0.10?
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Average deviation from perfect accuracy
: If the manufacturer's claim is correct (i.e., µ, 5 30 seconds, a 5 10 seconds), what is the probability that the average deviation from perfect accuracy would be 34 seconds or more?
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What is the velocity of the box as it leaves the table
: Find the accleration of the box during the sliding period. What is the velocity of the box as it leaves the table. What horizontal distance (R) from the table will the block reach when it hits the ground.
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What z-score corresponds to the sample mean
: When a production machine is properly calibrated, it requires an average of 25 seconds per unit produced, with a standard deviation of 3 seconds. For a simple random sample of n 5 36 units, the sample mean is found to be }x 5 26.2 seconds per unit..
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Modify the program to add a function to sum the rainfall
: Modify the program to add a function to sum the rainfall for each year. (Hint: you need to sum for each year. You can do this using a looping structure). Support your experimentation with screen captures of executing the new code
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What will be the frequency when the block is displaced
: A 2.00-kg block is attached to the end of a horizontal ideal spring and rests on a frictionless surface. What will be the frequency when the block is displaced and released from rest again?
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