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In the poll to evaluate presidential popularity, each person in the random sample of 1000 voters was asked to agree with one of the given statements:
1) President is doing a good job.
2) President is doing a poor job.
3) I have no opinion.
A total of 560 respondents chosen first statement, indicating they thought president was doing good job.
a. Create the 95% confidence interval for portion of respondents who feel president is doing a good job.
b. Based on the intervalin part(a), It is sensible to conclude that majority (more than half) of population thinks the president is doing good job?
What is the probability that none of these crimes will be solved? What is the probability that at least one of these crimes will be solved?
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
Suppose that patrons of a restaurant were asked whether they preferred beer or whether they preferred wine. 70% said that they preferred beer. 60% of the patrons were male. 80% of the males preferred beer.
They also know that the distribution of loss from fire has a skewed distribution; many have $0.00 losses and a few have large losses.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. From a sample of 100 fine-dining restaurants,
Consider Obama's health care plan. There are = #s of males and females. 50% of the females approve (A) of the plan and 70% of the males do not approve (N) of the plan.
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
Define the terms parameter and statistic. Be sure that the concepts of population and sample are included in your definitions.
Let the following all-integer linear program: Solve LP problem and recognize the feasible region, corner point solutions, and optimal solution.
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