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The average number of mosquitos caught in 81 mosquito traps in a particular environment was 900 per trap. The standard deviation of mosquitos caught in the entire population of traps is 150 mosquitos. What is the 99% confidence interval for the true mean number of mosquitos caught in all mosquito traps?
Create a 90% confidence interval for the true average number of unoccupied seats per flight. interpret this interval in the context of the problem.
the number of flawed 12.0v batteries produced at a particular manufacturer averages 4.4 per week. what is the
Find the z-score for each value of x = 54. (Give your answer correct to two decimal places.)
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
question length of pregnanciesthe length of human pregnancies from conception to birth varies according to a
Assembly line from which to observe the work habits of the workers on the line. what is the probability that the point she selects within 25 feet of the end of the line?
If battery posts are larger than 3.5 centimeters or less than 3.30 centimeters, they will be scrapped. Determine the proportion scrapped?
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
A 95% confidence interval from an SRS of 30 observations. (a) A 90% confidence interval based on n = 12 observations. S7.1
Please address the following question: When is the mean the best measure of central tendency? When is the median the best measure of central tendency?
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
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