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Determine and interpret the quartiles for carapace length of the adult male G. mollicoma. Obtain and interpret the 95th percentile for carapace length of the adult male G. mollicoma.
A retailer is looking to evaluate its customer service. Management has determined that if the retailer wants to stay competitive, then it will have to have at least an 87% satisfaction rate among it
Find the minimum sample size required to estimate a population proportion to within 0.05 with 95% confidence.
Find the lower end point of a 95% confidence interval for a population proportion based on a sample size of 100 if the sample proportion is 0.4. Give your answer to 2 decimal places.
What is minimum sample size required to estimate a mean within 2 with 95% confidence if the sample standard deviation is 20?
The half width of a 99% confidence interval for a mean based on sample size of 30 is 10. What is the value of the sample standard deviation? Give your answer to 2 decimal places.
The half width of a 95% confidence interval for a population mean based on a sample size of 30 is 5.9. What is the value of the standard error of the sample mean? Give your answer to two decimal pla
A confidence interval for a population mean is (20.4, 30.8). What is the value of the sample mean?
The mean monthly rent for a sample of studio apartments in one city is $1260 with a standard deviation of $230. the monthly rents for eight more studio apartments in the city are listed. using the s
If a player wagers, say, $10 on red and wins, then the house returns her $10 wager along with another $10. If the player loses, the house keeps her wager. If a player wagers $10 on red, what is her
A sample of size 30 has sample mean 20.4 and sample standard deviation 2.1. What is the lower end point for a 95% confidence interval for the population mean based on this data? Give your answer to
Which one of the following statements is correct regarding the width of a confidence interval?
Assume MBA graduates have incomes normally distributed with a mean of $100,000 and a standard deviation of $20,000. Law school graduates also have normally distributed incomes, with a mean of $90,00
An investigator wants to test if there is a difference in endotoxin levels in children who are exposed to endotoxin (what type of variable is this?) as a function of their proximity to operating far
A new analytical method to detect pollutants in water is being tested. This new method of chemical analysis is important because, if adopted, it could be used to detect three different contaminates
In a test of the hypothesis H0: u -=60 versus H: u =60, a sample of n = 50 observations possessed mean x = 60.6 and standard deviation s= 2.5. Find the p-value for this test.
If on average 10% passengers who have booked fail to turn up for their flights, what is the aveage probability that at least one passenger who has a booking will end up without a seat on particular
A discrete random variable has moment generating function mx(t) = e^(2(e^t-1)).
Hand-calculate the sample size that will be required to detect an increase or decrease of 1.5(sigma) from the mean of one population at alpha = 0.05 and beta = 0.05 for a hypothesis test.
Hand-calculate the sample size that will be required to detect an increase or decrease of 1.5(sigma) from the mean of one population at alpha = 0.05 and beta = 0.05 for a hypothesis test. (Note: The
Does the confidence interval from part (a) gives limits in which we expect 95% of the sample data to lie? why or why not. Does the confidence interval from part (a) gives limits in wich we expect 95%
Find E(x) where X is the outcome when one rolls a six-sided balanced die.Find the mgf of X. Also, using the mgf of X, compute the variance of X.
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of static friction between the crate and the truck's flatbed is 0.300, and the coefficient of kinetic f
A tube of Listerine Tartar Control toothpaste contains 4.2 ounces. As people use the toothpaste, the amount remaining in any tube is random. Assume the amount of toothpaste remaining in the tube fo