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A federal agency responsible for enforcing laws concerning weights and measures routinely inspects packages to determine whether the weight of the contents is at least as great as that advertised on the package. A simple random sample of 25 observations of a product whose container claims that the net weight is 10 ounces yielded a mean of 9.48 ounces and a variance of 1.43 ounces2. Do these data provide sufficient evidence to enable the agency to conclude that the true mean net weight is lower than the net weight indicated on the container? Use = 0.05 . Give the conditions under which this test is valid.
Suppose that in a particular sample, the mean is 70.07 and the standard deviation is 10.27. What is the raw score associated with a Z score of 1.88?
Identify the fallacies of relevance, weak induction, presumption, ambiguity, and illicit transference committed by the following arguments, giving a brief explanation for your answer. If no fallacy is committed, write "no fallacy."
probability of a sum that is even and less than 5
To test the null hypothesis, we state the mean difference between paired scores in the population and compare this to the difference between paired scores.
A college is considering making the purchase of a laptop computer a requirement for some of its programs. In the past, only 20% of students owned laptop computers. A random sample of 300 students revealed that 77 of them had laptop computers
Determine regression line for predicting January temperature from latitude.
Suppose that the height of an adult man in the US is a normal random variable. Suppose half of adult men are taller than 71 inches, and a quarter of adult men
Each parent ranks the four names in order of preference. Given each of the following decision rules, determine whether it is a social choice function.
A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled ..
A survey conducted by the Consumer Reports National Research Center reported, among other things, that women spend an average of 1.2 hours per week shopping.
americans have become increasingly concerned about the rising cost of medicare. in 1990 the average annual medicare
A truck without thelp from the truck driver (2hours per truck with the truck drivers help) Assuming M/M1:FCFS/8/8 model: What is the probability of 0,1 or 2 trucks in need of repair at any one time?
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