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The national average SAT score is 1028. Assume the scores are normally distributed with a standard deviation of 100.
a) If a random sample of 60 scores were selected, find the probability that the sample mean of the scores is less than 1050.
b) If a random sample of 60 scores were selected, find the probability that the sample mean of the scores is less than 1000.
The defective and non defective stampins proceed from the machine on a random manner. If 4 stampings are randomly collected, find The probability that almost 2 are defective.
Suppose you arrange the balls in the way that maximizes her chances of drawing the black ball. What is her chance of winning?Probability =
Assuming that the process of answering the questions on a five-question quiz is an independent trials process and that a student has a probability of .8.
A system consists of five identical components connected in parallel. Determine the reliability of the components such that the system reliabilty is 97%.
Neither married nor a college graduate? (answer should be a probability, that is, a number between 0 and 1). Married but not a college graduate? (answer should be a probability, that is, a number between 0 and 1).
What is the role of management in the woolworth pokies scandal and what went wrong? Who are the key skateholder that being affected by the scandal?
There are four entrances to the Government Center Building in downtown Philadelphia.The building maintenance supervisor would like to know if the entrances are equally utilized.
The 2011 gross sales of all firms in a large city have a mean of $2.3 million and a standard deviation of $0.6 million Using the Chebysev's theorem, find at least what percentage of firms in this city had 2011 gross sales of $1.1 to $3.5 million.
How would I construct a? 95% confidence interval about the slope of the true? least-squares regression line shoeing the Lower and Upper Bound?
What, in your considered judgement, were the three most significant political developments during the latter half of the 20th century.
Here are three ways to assess one's performance in high school: (1) GPA at graduation, (2) whether one graduated with honors
If P and Q are nxn matrices with PQ-QP = P, prove that (P^2)Q - Q(P^2) = 2(P^2) and (P^3)Q - Q(P^3) = 3(P^3)
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