Mean and the standard deviation for a distribution
Explain in your own words formulas for the mean and the standard deviation for a distribution of sample means?
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If 100 people are randomly chosen, determine the standard deviation of the sample mean IQ score. (Show work and round the answer to 2 decimal places)
The Club must choose a president, a vice president and treasurer for the school year. How many different manners can the officers be selected? (Show work)
In random sample of 13 microwave ovens, the mean repair cost was $80.00 and standard deviation was $15.40. Using the standard normal distribution with appropriate calculations for a standard deviation that is known
An electrical engineer has upon hand two boxes of resistors, with five resistors in each box. The resistors in first box are labeled 10 ohms, but in fact their resistances are 9, 10, 11, 12, and 13 ohms.
Why chi-square distribution with large degree of freedom approximates normal?
A recent investigation studied the effects of levels of several vitamins in a cell culture on the yield (g/L) of pyruvate, a useful organic acid. The data in the following table are presented as two replicates of a 23 design. The factors are
Assume you've a single data value M sampled from Gamma(6, P) distribution and you'd like to develop a confidence interval for P. But, you have only a M2 table of percentiles available.
Determine the probability that the number of requests in hour is between 8 and 10 inclusive? Provide your answer to four decimal places.
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