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The average number of mosquitos in a stagnant pond is 60 per square meter with a standard deviation of 12. If 16 square meters are chosen at random for a mosquito count, find the probability that the average of those counts is more than 63.0 mosquitos per square meter. Assume that the variable is normally distributed.
Simple random sample of 100 elements is taken: (a) What is the chance of an element being included in the sample? (b) What is this chance called (hint: not probability)?
Find the standard error of mean. Also establish an interval estimate around the sample mean using one standard deviation of the mean.
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
Construct a 94% confidence interval for the true percentage of smokers among all people who completed four years of college.
What is the Chi-square test? Where can you apply it? Please site an example of how it was used and the outcome of the test. I think this could help me better than the book, it is difficult to understand.
Use a t test to test the claim about the population mean u at the given level of signifiance a using the given sample statistics. For each claim, assume the population is normally distributed.
What are the advantages and disadvantages of regression models in comparison to using a computerized regression routine? Give examples.
An orange juice producer buys only one kind of oranges. The amount of juice squeezed from each of these oranges is approximately normally distributed with a mean of 4.2 ounces and a population standard deviation of 1 ounce.
It is known that 20% of the children in a school are first graders. If the school is sending a group of 11 randomly selected children to camp, what is the probability that less than 4 of the campers are first graders in this binomial distribution?
A mean life of 1800 hours and a standard deviation of 200 hours. Assume the life of these light bulbs follows a normal distribution. Find the probability that a single light bulb will have a life greater than 2000 hours.
Depends on the satellite information illustrate what is the expected number µ of real forest fires on the Seward Peninsula.
Given the sample size of 36 bolts with a mean of 3 inches and a standard diviation of .3. What is the 99% confidence interval for the true mean length of the bolt.
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