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A report states that 38% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5% with 98% confidence?
The display represents Excel output for an ANOVA analysis with σ = 0.05.
With a standard deviation of 1.7 grams. Assuming the distribution of weights is normally distributed, 4% of whooping crane eggs weigh less than how many grams?
Keith's florist has 18 delivery trucks used mainly to deliver flowers in the SC area. Of these 18 trucks, 5 have brake problems. A sample of 4 trucks is randomly selected. What is the probability that 2 of those defective have defective braked. Ro..
What are the implications of statistical variation? Why are we interested in understanding and measuring variation?
An investigator wants to design a study to estimate the difference in the mean BMI between boys and girls age 12 living in new york city. How many boys and girls are needed to ensure 95% confidence interval estimate for the difference in mean BMI ..
From a random sample we know that the average duration of unemployment in a low developed region A is 147 days (with standard deviation sA = 32 days and nA = 230 unemployed).
A national Retail Foundation survey found housholds intended to spend an average of $932 during the December holiday season. Assume that the survey included 850 households and that the standard deviation of the sample is $215.
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
The least squares simple linear regression line minimizes the sum of the vertical deviations between the line and the data points.
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
Rob Johnson is a product manager at Diamond Chemicals, which is considering whether to launch a new product line that will require it to build a new facility.
The New York Times reported (L.J> Flynn, Tax Surfing, The New York Times, March 25, 2002, p. C10) that the mean time to download the home page for the internal Revenue Service (IRS) , was 0.8 second. Suppose that the download time was normally di..
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