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anguard Balanced Index is another highly regarded fund that represents the entire U.S. stock and bond market (an index fund). The mean and standard deviation of annualized percent returns are shown...

Studies in Montana, Illinois, Wyoming, Utah, and California give the following percentages of successful nests x: Percentage success for mallard duck nests   77 23 47 59 35 y: Percentage...

One way to answer this question is to examine profits as percentage of assets. A random sample of 50 Fortune 500 companies gave the following information.the sample mean, sample variance, and sample...

The following is based on information taken from the National Retail Federation. A random sample of 895 incidents of shoplifting gave the following age distribution. the mean age, sample variance,...

I'm building a poker application for a software engineering class and am struggling with some of the math.  I want to determine what the relative likelihood of various dependent events taking...

A commuter train from Long Island to NYC is scheduled to arrive at 8.07 a.m. every weekday morning. The probability that the train arrives on time is 0.8. Suppose 25 weekdays are randomly selected...

An IQ test is designed so that the mean is 100 and the standard deviation is 2424 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students...

I have 10 programs, ranked 1-10. Each program has 3 preferences, a 1st, 2nd, and 3rd preference with the most former being the most preferred. Each preference correlates with a month, and there are...

A shipment of 250 netbooks contains 3 defective units. Determine how many ways a vending company can buy three of these units and receive (a) no defective units. (b) all defective units. (c)...

Suppose 60% of the population approves of the job the governor is doing, and that 25 individuals are drawn at random from the population. Solve the following    a. what is the probability...

probability quiz

A credit card company wants to see how strong the relationship is between the amount of money a person makes per year and the amount they charge on their credit cards. There are 9 pairs of data...

Use the given information to find the minimum sample size requires to estimate an unknown population mean μ. How many adults must be randomly selected to estimate the mean FICO (credit rating) score...