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A sample of 100 $1.00 bills from a Subway cash register revealed that 16 had something written on them besides the normal printing. At significance level of 0.02, is this sample evidence consistent with a hypothesis that 10% or fewer of all dollar bills have anything written on them besides the normal printing?
We assume that we have selected two independent random samples from populations having proportions p 1 and p 2 and that p-hat 1 = 800/1000 and p-hat 2 = 950/1000
Develop a 95% confidence interval for the proportion of the population of adults who feel customer service is better today than it was 2 years ago.
Program measured in minutes is found to follow a gamma distribution with parameters a=3 and b=2. what is the probability that CPU demand of a program will exceed 1 minute?
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
At a significance level of .05, the management wants to perform a hypothesis test to determine whether the quality of items produced appears to be independent of the production process used. Calculate the expected number of defective units produce..
The entire shipment is accepted if only one or non of the tablets is defective. If the defect rate is 5% then what is the probability that the shipment will be accepted?
Which variable is the independent variable and which is the dependent variable? Write out the regression equation and sketch it on the plot. What percentage of the variability in the defect rate can be explained by differences in volume?
Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Round the answer to 3 decimal places. Omit the "tiny_mce_markerquot; sign in your response.)
Assume we interested in relationship between the age of individual, as measured by visits. Suppose after selecting 15 members the observation:
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval?
The American Bar Association conducted a survey in 1986 showed that the average income of lawyers in 1986 was $ 120,000. An investigator took a sample of 64 lawyers in 1990, produced a median income of $ 140,000 with a standard deviation of $ 24.5..
Results are normally distributed with mean 200 and standard deviation 50. find probability that a single score will be less than 264.
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