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To find a Z score from the given data.
An aptitude test has a mean of 220 and standard deviation of 10. Find the corresponding z score for:
a) a test score of 232 b) a test score of 212
Statistics and Probability, Statistics
An equally weighted portfolio consists of 41 assets which all have a standard deviation of 0.137. The average covariance between the assets is 0.118. What is the standard deviation of this portfolio expressed as a percen ...
Military often provides a form of qualification test for people to enter special career fields. Suppose that a large number of people have taken a test for a certain career field. Suppose that the mean of all people taki ...
An electronics store receives a shipment of 37 graphing calculators, including 5 that are defective. Eight calculators are chosen at random to be sent to a local high school. How many selections contain 3 defective?
For the past 110 ?years, a certain state suffered 28 direct hits from major? (category 3 to? 5) hurricanes. Assume that this was typical and the number of hits per year follows a Poisson distribution. Complete parts? (a) ...
According to national data, about 14% of American college students earn a graduate degree. Using this estimate, what is the probability that exactly 24 undergraduates in a random sample of 200 students will earn a colleg ...
At a college, 66 % of courses have final exams and 56 % of courses require research papers. Suppose that 45 % of courses have a research paper and a final exam. Find the probability that a course has NONE of these two r ...
An automobile accidents occur over a 72 hour holiday period are like events in a poisson process with = 10 per hour. Let Y be the time for the first accident. a) What is the mean of Y and variance of Y? b) Find P(Y > 15 ...
You are working with a MOE of +/-4% and a confidence level of 95%. P and Q =.50, and your CPI is $25.00. The company you work for needs to make a decision as to whether they may need different advertising for men and wom ...
A hotel claims that 95?% of its customers are very satisfied with its service. Complete parts a through d below based on a random sample of seven customers. What is the probability that more than six customers are very? ...
What are some differences between Transaction Processing Information Systems and Management Information Systems?
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