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The mean weight of loads of rock is 46.0 tons with a standard deviation of 12.0 tons. If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 45.0 tons. Assume that the variable is normally distributed.
A recent survey indicated that 82% of single women aged 25 years old will be married in their lifetime.
What were the reasons for the creation of the European Economic Community? Why did the organization change its name to the European Union?
If probability of getting sample mean x less than unreported sample mean is 0.025, determine value of the unreported sample mean?
Search the Web for Agile Project Management and identify the typical projects that benefit using this method.
Using Chi-square table finding the P-value and interpret the result
A contest. This is a standard deviation contest. You must choose four numbers from the whole numbers 0 to 9, with repeats allowed.
Scores on a standardized exam are approximately normally distributed with mean score 540 and a standard deviation of 100. Find the probability that a test taker selected at random earns a score in the given range, using the normal distribution as ..
a researcher investigated the effect of volume of background noise on participants accuracy rates while performing a
If sales is the variable you are trying to explain and you have 2 independent variables of color and price. The color coefficient is 100, and the price coefficient is -200. You have an intercept coefficient of 999 and an r-squared value of .2706. ..
A bridge hand consists of 13 cards dealt at random from an ordinary deck of 52 playing cards. How many possible bridge hands are there?
Do placebos really work? Researchers in Japan conducted an experiment on 13 individuals who were extremely allergic to poison ivy.
Compare the means of two populations using 96% confidence interval:
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