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The average income of a country is known to be £10,000 with standard deviation £2,500. A sample of 40 individuals is taken and their average income calculated.
a car company made a change to their fuel injection system that may improve gas mileage. to determine if this was the
Determine the Geometric mean for the following values. Calculate mean. median and mode from the following frequency distribution of marks at a test in English.
two perecent of calculators produced by texas intruments are defective. a batch of 300 calculators is tested to see if
surveys repeatedly show that about 40 of adults in the u.s. indicate that if they only had one child they would prefer
A simple random sample of 50 adults is obtained, and each person's red blood cell count (in cells per micro-liter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54.
suppose there is a binomial distribution with n 64 and p 0851. what is the mean of the binomial distribution?2. what
What if the number of debilitating network viruses detected in a day at the firewalls of an Internet service provider within a certain geographic region is fueling a possible management decision to upgrade the detection system.
You're not sure if you should buy a stock and need to discover the probability of the stock having a positive return (based on one year).
A stock price is $30, the expected return is 18% per annum and the volatility is 20% per annum. What is the mean of the logarithm of the stock price in two years?
What is correlation? How is correlation used to understand the relationship between two variables? What is the difference between positive and negative (inverse) correlation?
it is found that when a particular 4-sided die is rolled a 1 occurs 26.9 of the time a 2 occurs 23.8 of the time a 3
What is the average monthly amount charge? What percent of monthly charges are between $600 and $ $889 What percent of monthly charges is less than $100.
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