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A recent study indicated that 29% of the 100 women over age 55 in the study were widows.
a. How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion of women over 55 who are widows?
b. If no estimate of the sample proportion is available, how large should the sample be?
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
A salesman must select 2 of the first component and 3 of the second to take on a sales call. How many different systems can the salesman select?
Q2 is dummy variable equal to 1 in second quarter and 0 otherwise; and Q3 is final dummy variable equal to 1 in third quarter and 0 otherwise. Determine the Base Quarter?
Prepare the confidence interval of 95% for the welders' proportion that graduated in the school of welding.
Is there evidence that teams with higher total payrolls tend to be more successful? Justify your answer.
Is the estimate from the participants significantly higher than the actual number (µ = 3.1)? Use a one-tailed test with = .05.
The wheat harvesting season is short. Farmers deliver their truck loads of wheat to a giant central storage bin within a two-week span. Because of this, wheat-filled trucks waiting to unload and return to the fields have been known to back up for ..
A fast food chain restaurant chain claims that lunch will be served within nine minutes of placing your order, or it is free. A sample of eight customers revealed the following waiting times in minutes:
In a paragraph explain the differences between the Independent Samples and Paired Samples T-Test. When do you use each? Purpose a research question that could be addressed using each test
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary ..
Calculate the value of Pearson correlation. Illustrate what information is provided by the numerical value of the Pearson correlation.
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