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Derive expression for a and b in terms of standard deviation of x and y, mean of x and y, and the correlation b/w x and y. Given E(y|x)=a+bx.
A biology professor claimed that the proportions of grades in his classes are the same. A sample of 100 students showed the following frequencies:
An estimated population variance of 200. a.) What is the standard deviation of the distribution of differences between means? b.) What is the mean? c.) What will be its shape?
Fishing Northern Pike. Athabasca Fishing Lodge is located on Lake Athabasca in northern Canada. In one of its recent brochures, the lodge advertises that 75% of its guests catch northern pike over 20 pounds.
question 1a busy landscaping supplies company sells wood chips for garden mulch. the mulch is sold by the cubic metre
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
With a sample standard deviation of 33 miles. At the 0.05 level of significance is there a difference in the mean number of miles traveled between the two groups?
problemthe lake placid town council has decided to build a new community center to be used for conventions concerts and
A financial analyst is interested in estimating the average amount of a foreign loan by U.S. banks. Construct the Stratum weights for proportional allocation
The mean fare charged for service from the beach to the airport is $18.00 and the standard deviation is $3.50. We select a sample of 15 fares. What must you assume to make the above calculation?
Florida State University administers a test of mathematics placement to students when they first enter the university.
You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenien..
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