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Create a dataset of at least 50 observations (from your workplace or personal experiences). Calculate the descriptive statistics of mean, median, mode, standard deviation and range of the data. Wh
For a particular hour, the average amount in the 25 bottles in the sample is 33.2 ounces with s = 2.6 ounces. What will be the value of the margin of error for a 95% confidence interval for the popu
A study of cell phones and the risk of brain cancer looked at a group of 469 people who have brain cancer. The investigators matched each cancer patient with a person of the same sex, age, and race
"We will replace any tire free of charge if the lifetime of the tire is less than miles." (That is, what is the largest value for a lifetime a tire can have and still be among the shortest 1% of all
1. If a population mean is 300 and the sample mean is 400, the difference of 100 is called:
Relative frequency distributions allow us to focus on
You work for a government agency and asked to test this claim to determine if the true proportion differs from 70%. You find that in a random sample of 1165 people in the U.S., 746 agreed with this
The EPA wants to test randomly selected sample of n water specimens and test the mean daily rate of pollution produced by a mining operation. If the EPA wants a 95% level of confidence and a samplin
Compute profit diagrams for the following ratio spreads: a) buy 950-strike call, sell two 1050-strike calls
Draw profit diagrams for the following positions: a) 1050- strike S&R straddle
The correlation between two variables is -0.63 for a sample of 20 observations. What is the coefficient of determination between the two variables?
The slope of a regression equation is 10, the value where the line intersects the Y axis when X = 0 is 4. What is the regression equation?
The best method of presenting data that occurs over a period of time is:
Jim takes a simple random sample of 15 from a very large population whose variance is unknown. She intends to perform a one-tail test for the mean, so draws a boxplot of the sample values and finds
At a college, a coefficient of correlation of -0.70 was found between the number of high-school activities offered and the number of drug-related suspensions. What percent of the total variation in
In 2005, the average GPA for students was 3.15. A sample in 2008 showed that the average GPA for students was 3.46. An alternative hypothesis for GPA of students is:
A medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. The mean capacity of a sample of 30 nonsmokers is 5.0 litters with a sample standard deviation o
Let X be a discrete and nonnegative r.v. show that
Suppose 1,000 of the 2,000 UCLA university professors oppose the US policies in Middle East. Using the 0.95 degree of confidence, the interval estimates for the population proportion is
let X and S^2 be the mean and variance of a random sample size n=16 from the normal distribution N(u, gamma^2) a) find d (using distrubution tables) such that
Home, What is the method to prove a cumulative distribution function of Frechet distribution?Complete proof?
The length of time in minutes required to complete a series of physical therapy exercises is normally distributed with a mean of 70 minutes and a standard deviation of 12 minutes. What percent of pa