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870 people were selected for grand jury duty, and 39% if them were Americans of Mexican ancestry. Among the people eligible for grand jury, 79,1% were Americans of Mexican ancestry. Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
Forecast sales for the next day using a three-day weighted moving average where the weights are 3, 1, and 1 (the highest weight is for the most recent number).
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
Assume that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
A power of 0.2203 can be interpreted to mean there is a 22.03% chance of selecting a sample whose sample mean is larger than 166.3 lb.
A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean length of fish in the tank is 15 inches, and the standard deviation is 2 inches. A random sample of 36 fish is taken from the tank.
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
Formulate and solve a 0-1 integer linear program model that can be used to find the minimum number of locations necessary to provide coverage to all areas. Clearly indicate your linear program model.
If the coefficient of correlation is 0.4, the percentage of variation in the dependent variable explained by the variation in the independent variable
The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute.
Assuming that these results are sample data randomly selected from the population of all past and future Olympic games
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week. A 99% confidence interval for the population is??
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