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Using the formula (provided below) for sample size determination, answer the following numerical questions.
n=z2XSD2/E2 ; Where SD= standard deviation of the sample observations; value of confidence interval (Z) at 95% level is 1.96.
A store manager for Barnes and Noble wants to run a study to determine how such a household pays per month on novels. The manager wants to obtain estimates within a 10% margin of error. Past research has shown that the average monthly spending on novels is $10 and has a standard deviation of $1. What sample size will the manager need for a reliable estimate with a 95% level of confidence.
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
Now suppose he says that if he is optimistic about the success of one project, he is likely to be optimistic about the others as well. For your simulation, this means that if one of the probabilities increases, the others also are likely to increa..
the probability to catch disease a is 10. the probability to get disease b is 17. the probability to get at least one
But anything could have been in that backyard-a load of cocaine, an illegal stockpile of weapons, or other major threats to society.
the time it takes alice to walk to the bus stop from her home is normally distributed with mean 13 minutes and variance
What are accruals? Provide examples of accruals. Why do accruals require adjusting entries? What types of accounts are debited and credited in an unearned revenue adjusting entry?
How can you determine if two vectors are dependent or independent and Is division of a vector by another vector defined?
an electronic company manufactures resistors that have a mean resistance of u 100 ohm and a standard deviation s 10
a rational decision maker must choose between two alternatives. alternative 1 has a higher emv than alternative 2 but
A car insurance compancy has recorded the number of claims for the past quarter by age and gender. The information is recorded below.
State two of these events that are mutually exclusive.- State two of these events that are independent.- Are any two of these events complements? If so, which two events are they?
Suppose that the thermometer readings are normally distributed with mean of 0° C and a standard deviation of 1.00° C. A thermometer is randomly selected and tested.
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