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A class of first graders includes 7 girls and 14 boys, 2 students are selected at random for the teacher to help on a given day. What is the probability that both are boys?
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
As a part of your proposals. you need to submit demographic information to help demonstrate that the location chosen by the management teams will be a good investment.
A prestigious university requires a score of at least 750 on a graduate exam for admission to its MBA program. Suppose the graduate exam is normally distributed with a mean of 500 and a standard deviation of 200.
the minneapolis heart institute foundation conducted a study to determine the benefit of follow-up care for patients
Using the .01 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution.
what is the probability that a randomly selected human resource manager received over $100,000 in 2007 and what is the probability that the sample mean annual salary falls between $70,000 and $80,000?
A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?
What shape curve do you get when your data set has the mean, median, and mode all with the same value? Could the value of the sample mean and the value of the population mean ever be the same?
Machine which fills quart milk cartons is set up to average 32.2 oz per carton, with standard deviation of 1.2 oz. Determine probability that filled carton will contain less than 32 oz of milk?
Determine the pairs which are significant according to LSD and what pairs are important according to Bonferroni?
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribtion of the battery lives closely follows the normal probability distribtion with a standard deviati..
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
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