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The heights of 18 year old men are approximately normally distributed with mean 68 inches and a SD of 3 inches.
A. What is the probability that an 18 year old selected at random is between 67 and 69 inches tall?
B. If a random sample of 9 18 year olds men is selected, what is the probability the the mean hight x is between 67 and 69 inches?
C. Compare answers for part A and B. Is the probability in part B much higher? Why would you expect this?
Suppose you have the experiment of flipping a coin three times.
What is the possible uses of regression and correlation analysis in doctoral-level research? Would I be able to use these techniques in my dissertation, or any application in other areas?
If the sample size is 36 with three treatment means (response variables) and you are performing an ANOVA, then the degrees of freedom for the error term will be:
Assume that a hand of 12 cards is dealt from a normal deck of 52 playing cards. What is the probability that of the 12 cards, 3 will be diamonds, 3 will be clubs, 3 will be spades, and 3 will be hearts.
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Explain why it makes sense for a set of data to have a correlation coefficient of zero when the data show a very definite pattern.
If the mean lifetime of this type of component is 100 hours and its standard deviation is 19 hours, how many of these component must be in stock so that the probability of the system is in continual operations for the next 2,000 hours is at least ..
Albert Einstein stated, "The formulation of a problem is far more often essential than its solution, which may be merely a matter of mathematical or experimental skill.
Create an research question, and then state the experimental and null hypotheses. Then, explain why null and alternative hypotheses have to be mutually exclusive. Finally, discuss how Type I and Type II errors are related to your hypotheses.
A manager receives a forecast for next year. Demand is projected to be 600 units for the first half of the year and 900 units for the second half.
A realtor took a random sample of records of sales of homes from the files maintained by the Albuquerque Board of Realtors.
Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
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