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Why are estimations and confidence intervals important?
Do confidence intervals and estimation play a role in the selection of sample size?
Please explain your answer.
High precision titanium spheres are popular components in manufacturing of ball bearings. A factory has ordered a shipment of 5000 titanium spheres from aboard. It is found that the shipment has a mean radius of 1.5 cm with a standard deviation ..
Would you be willing to provide an example of both methods (step by step) described in your document for determining the forecast based upon the two different methods. Maybe just for one single city.
Determine whether and how each of the following factors would shift the demand curve for chiropractic visits:
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
Is there any reasonable explanation for the two months that have the highest frequencies?
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
Dunn Poitiac has compiled the following sales data regarding the number of cars sold over the past 60n selling days. Answer the following questions for the sales data shown.
Determine the coefficient of correlation between the two variables. Interpret the value.
What is the smallest number of consumers that Timex can survey to guarantee a margin of error of .05 or less at a 99% confidence level and calculate the intervals correctly
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
A sample of 46 bars is taken and their mean length is determined to be 51 centimeters with a standard deviation of 3.6 centimeters. Using a .01 significance level, test the retailers claim that the population mean is less than 50 centimeters.
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