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Technical data provided with a room dehumidifier explain that units tested from the production line consume a mean of 800 watts of power, with a standard deviation of 12 watts.
The superintendent of a large office complex, upon evaluating 30 of the units recently purchased and finding their mean power consumption to be 805 watts, claims that her shipment does not meet company specifications. At the 0.05 level of significance, is the superintendent's complaint justified?
gallop a national polling organization surveyed 1018 randomly selectd american adults about their level of education
Write a program to calculate students average test scores and their grades - a method to read and store data into two arrays, a method to calculate the average test score and grade and a method to output the results.
To study the energy savings due to adding solar heating panels to a house, researchers measured the natural gas consumption of the house for more than a year, then installed solar panels and observed the natural gas consumption for almost two year..
an entrepreneur is considering the purchase of a coin-operated laundry. the current owner claims that over the past 5
Based on the results of the peliminary poll, how large a sample is required for the main poll, assuming that the main poll should have a margin of error of 3.3% and a confidence level of 96.7%.
Find the probability that he will answer all 10 questions correctly.
Suppose the graduate exam is normally distributed with a mean of 500 and a standard deviation of 200. If a test taker is randomly selected, what is the probability he or she scores 750 or better?
the runoff in the westfield river near springfield ma for 15 months is as followsyearflow million gallons per
according to a study by the centers for disease control and prevention about 33 of u.s. births are caesarean deliveries
What should the warranty period be to replace a malfunctioning calculator if the company does not want to replace more than 1% of all the calculators sold.
Why were the subjects randomly assigned to the diets instead of letting people pick what they wanted to eat?- Why were the meals prepared by dieticians?
The amounts (in ounces) of juice in eight randomly selected juice bottles from a normally distributed population are given below. Construct a 95% confidence interval for the mean amount of juice in all such bottles. Round the confidence interval ..
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