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A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthfully.• What is the probability that exactly one is being deceptive.• What is the probability that at most one is being deceptive.• What is the mean and standard deviation of this distribution.
State the correct decision and give justification for your decision.
It would like to be within plus or minus $55 of the true mean with a 95% confidence level. The standard deviation is thought to be $700. How many card holders should be sampled?
What is predicted value for National Health Expenditure as a % for 2010? What is the 95% confidence interval for your estimate? Does the trend continue? Does year impact expenditure?
A local tire dealer wants to predict the number of tires sold each month. He believes that the number of tires sold is a linear function of the amount of money invested in advertising.
According to accountemps inc. 48% of all executives believe that employees are most productive on Tuesdays. a random sample of 200 executives is taken for a study.
A normal population has an average of 80 and a standard deviation of 10. You select a sample of 25. Calculate the probability that the sample mean
Does achieving a high grade in reading cause an individual to earn a high grade in Statistics? Explain your answer with reference to the term lurking variable.
Use the rules to find an F -statistic for testing whether the term is present, assuming an unrestricted model. Do any of your answers change if you assume a restricted model instead?
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
A student conducted a study on the height and weight of adult males. She collected data from 40 adult males and found that average height is 68.34 inches with a standard deviation of 14.02 inches
A company operates four machines during three shifts each day. From production records, the data in the table below were collected.
The sample mean life is 805 hours with 64 hours of the sample standard deviation. Is there enough evidence to conclude that the manufacturer's claim is true at the 5% significance level?
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