Question Details

A simple random sample of 64 observations was taken 




1.	A property of a point estimator that occurs whenever the expected value of the point estimator is equal to the population parameter it estimates is known as

	a.	consistency
	b.	the expected value
	c.	the estimator
	d.	unbiasedness
	e.	None of the above answers is correct.
	
2.	A simple random sample of 64 observations was taken from a large population.  The sample mean and the standard deviation were determined to be 320 and 120 respectively.  The standard error of the mean is

	a.	1.875
	b.	40
	c.	5
	d.	15
	e.	None of the above answers is correct.
	
3.	The number of random samples (without replacement) of size 3 that can be drawn from a population of size 5 is

	a.	15
	b.	10
	c.	20
	d.	125
	e.	None of the above answers is correct.
	
4.	Random samples of size 81 are taken from an infinite population whose mean and standard deviation are 200 and 18, respectively.  The distribution of the population is unknown.  The mean and the standard error of the mean are

	a.	200 and 18
	b.	81 and 18
	c.	9 and 2
	d.	200 and 2
	e.	None of the above answers is correct.
	

5.	A population has a mean of 80 and a standard deviation of 7.  A sample of 49 observations will be taken.  The probability that the sample mean will be larger than 82 is

	a.	0.5228
	b.	0.9772
	c.	0.4772
	d.	0.0228
	e.	None of the above answers is correct.





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