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A state administered standardized reading exam is given to eighth grade students. The scores on this exam for all students statewide have a normal distribution with a mean of 536 and a standard deviation of 42. A local Junior High principal has decided to give an award to any student who scores in the top 10% of statewide scores.
How high should a student score be to win this award?
A central university has a student population of 60,000. The university is interested in determining what proportion of them is in favour of a new grading system.
How does one find expected profit from a probability demand distribution?
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity).
Determine mean and standard deviation for the population. Draw the distribution and locate two scores on the sketch.
a specific automotive part that a service station stocks in its inventory has an 8 chance of being defective. suppose
A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution. What is the standard deviation (in minutes)?
A random group of apartments was selected from a city to analize the number of bedrooms they have. Is there evidence to reject the hypothesis that the apartments are equally distributed between 1 bedroom, 2 bedroom, and 3 bedroom apartments, at al..
A random sample a 16 Google managers yield the following information on annual salaries. The sample mean is $69,000, with a sample standard deviation of $4,000. What is the mean salary of all Google managers?
A building contractor pays $500 to bid on a contract. If he gets the contract, the probability of which he estimates to be 0.70, he will make a profit of $50,000.
The sample mean life is 805 hours with 64 hours of the sample standard deviation. Is there enough evidence to conclude that the manufacturer's claim is true at the 5% significance level?
What is the probability the Time/CNN poll will provide a sample proportion within plus-or-minus 0.02 of the population proportion?
What does central limit theorem say about distribution of John's average payoff after 365 bets in a year?
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