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the weight of a randomly selected piece of luggage on international flights has an average of 22.6 pounds and a standard deviation of 5.4 pounds.
A) If the weights are normally distributed, what proportion of the luggage weights more than 30 pounds?
B) In a shipment of 200 pieces of luggage, how many can be expected to weigh less than 20 pounds?
Flip a coin 20 times and 5 heads are obtained. Let p denote the probability of getting a head from each flip. Do a conservative test of size 0.06 for H0:p= 0.4
A random sample of n = 4 scores is selected from a population with µ = 80 and σ = 20. On average, how much difference would you expect between the sample mean and the population mean?
Find the asymptotic distribution of the MLE of the indicated parameter and find formulas for approximate standard errors of the MLE.
a teacher believes that the class scores on a final examination should be approximately normal distributed. if this
A recent report in Business Week indicated that 20 percent of all employees steal from their company each year. If a company employs 50 people, what is the probability that: Fewer than 5 employees steal?
Provide an example of a situation from your personal or professional experience where an two-sample test of hypothesis of dependent samples would be useful in a decision-making process.
A new county hospital is attempting to determine whether it needs to add a particular specialist to its staff. Five percent of the general hospital population in the county contracts the illness the specialist would treat.
Assume the probability that a person has the desease is 0.1 for all people, independently of each other. Compute the total expected number of tests necessary.
Preference to change blades is recorded. Do the data support the twin-blade manufacturer's claim? α=.05. This is a t-tests independent samples.
The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of diffe..
there are 10 steps leading up to the library entrance. you walk up the stairs taking 1 step at a time 2 steps at a time
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
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