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Statistic question?

If we have an SRS of 1600 students and the sample mean = 148.  Compare with an SRS of 900 students with the margin of error for a 95% confidence interval of µ is ?  the answer should be...

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Statistics Question

If a specimen is weighed 8 times on a scale.  σ = 0.001.  The average weight is 4.1602 grams.  A 99% confidence interval for the true weight of this specimen would be?

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probability Question

The random variable X denotes the time taken for a computer link to be made between the terminal in an executive's office and the computer at a remote factory site.  It is known that X has a...

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probability Question

 You have a four sided die with 1, 2, 3, 4 spots.  What is the sample space when we count the total sum number of spots on the bottom face for rolling the die twice (spots on the first and...

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Probability

The amount of milk sold each day by a grocery store varies according to the normal distribution with mean 130 gallons and standrd deviation 12 gallons. On a randomly selected day, the probability...