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A car manufacturer has redesigned the anti-theft device on one of its models to increase the time that it takes for a professional car thief to be able to steal the car. To determine the length of time that it takes it employs 30 reformed criminals to see how long it takes to steal the car. The sample has a mean time of 6 minutes and a standard deviation of 2 minutes.
i) Calculate a 95% confidence interval for the mean length of time it will take a car thief to steal the car.
ii) Calculate the size of the sample required so that the margin of error for the 95% confidence interval is 0.5.
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
Probability histogran curve of percentage of (P)z
What are the requirements that must be met for a regression analysis? What happens if these requirements are violated? Why is the analysis of residuals important?
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg.
Job Interviews: Based on information from MRINetwork, some job applicants are required to have several interviews before a decision is made. The number of required interviews and the corresponding probabilities are: 1 (0.09); 2 (0-31); (0.37); 4 (..
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
Explain and give examples of how the particular outcomes of a study can suggest if a particular threat is likely to have been present.
After polling every 8 th graduate, a major university estimated annual salary of its alumni to be $103,000. What sampling technique was used?
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.
If random sample of 9 loads is selected for weight check, determine probability that mean weight of those loads is more than 40.60 tons.
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