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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,
a. What is the probability that the sample has between 15% and 25% of restaurants that have established such policies?
b. The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
Determine the point estimate? Give the symbol and value.
Find the probability that a randomly selected employee earns less than $5.43.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the decision rule.
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weig..
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
They found that those with higher levels of cigarette use had lower GPAs, and vice versa. What can you rightfully conclude from this? Why? Be specific about what this kind of information may indicate and mean.
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
It took a contractor 5000 hours to manufacture their first unit of an item. If the contractor expects to achieve a 94% unit learning curve, how many hours would be required to manufacture units 76-100?
How can you answer the dual simplex question with maximization objective function and also explain difference between m tecnique and two phase method?
Calculate p value? What is the critical value?
If the probability distribution of X is: Determine the expected value of X? Find out the variance of X?
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