Alternate hypothesis for a one-sided test
It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the alternate hypothesis for a one-sided test?
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The hard drive reader head is the only likely component to fail, and all that fail are replaced. These have a life expectancy that follows the normal distribution with mean 60 months and standard deviation of 2 months.
What is the probability the average of the sample is more than $37000 if a random sample of 75 house holds is taken?
A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3/s of water? What is the effect of the water temperature on the pump power that is required?
A random sample of size n is to be drawn from a population with mean = 700 and standard deviation = 300. What size sample would be necessary in order to ensure a standard error of 10?
If a=0.01, is there evidence to suggest that Clearing department employees spend an average of 7.5 hours working on an average day? Step 1: State the hypotheses and identify the claim.
If the fracture strength measurements of glass have a standard deviation of 0.4 thousands of pounds per square inch, how many glass fracture strength measurements should be taken if the sample mean is to be within 0.2 thousands of pounds per squar
Classified ads in newspaper offered for sale several used cars of the same make and model. Listed below are the ages of cars and the advertised prices.
A machine has 15 identical componenets which function independently. The probability that a component will fail is 0.100. The machine will stop working if more than three components fail. Find the probability that the machine will be working.
A researcher conducts a study of white and black attitudes toward the police in her community. The percentage of white respondents (N = 300) who say they have a favorable attitude toward the police is 55% with a 95% confidence interval of +/- 5.6%
Suppose that Z is a random variable with a N(0, 1) distribution. Define a stochastic process via X(t) = (?t)Z, and note that for each t > 0, X(t) has a N(0, t) distribution. Is this Brownian motion?
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