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A team of scientists is due to spend six months in Antarctica carrying out research. One major piece of equipment they will be taking is subject to breakdowns caused by the sudden failure of a particular component. Because a failed component cannot be repaired the team
intend to carry a stock of spare units of the component, but it will cost them roughly $3000 for each spare unit they take with them.
However, if the equipment breaks down and a spare is not available a new unit will have to be specially flown in and the team will incur a total cost of $4000 for each unit that is delivered in his way. An engineer who will be traveling with the team has estimated that the number of spares that will be required during the six months follows the probability distribution shown below:
No. of spares required
0
1
2
3
Probability
0.2
0.3
0.4
0.1
Determine the number of spares that the team should carry if their objective is to minimize expected costs.
If sample mean is M=44. Is this sufficient to demonstrate significant effect? Again assume a Two-tailed test with a=0.05.
Show all the steps of your hypothesis test including a) the claim being tested , b) the null and alternative hypothesis, c) the test statistic, d) the p value, e) initial conclusion, and f) a final conclusion about the original claim.
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
more than 50 million guests stayed at bed and breakfasts bampbs last year. the web sitenbsp for the bed and breakfast
The average for 14 cross-country runners is 172 mg/dl with a standard deviation of 41 mg/dl. Solve using the Traditional Method. Find the p-value for your test statistic. Use an α = 0.05.
Independently of the others. If the jury reaches a decision by majority rule, what is the probability that it will reach a wrong decision?
a study of 35 browns gerbils showed that their average weight was 4.7 ounces. the standard deviation of the population
Plot the data on the same line and give your impression regarding any apparent differences between the two companies.
one sample has n 8 and ss 21 and a second sample has n 8 and ss 35. what is the pooled variance for the two
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
Illustrate the regression model and predict it. The following table shows the yearly maintenance costs for several cars, as well as their age.
Calculate the mean difference for the following data. The scores are the number of pictures the participants remembered correctly out of 20.
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