An F-statistic is: a. the ratio of two variances b. a population parameterÂ Â Â Â Â Â Â Â Â Â c. the variance of the difference between means d. a ratio...

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Statistics

An F-statistic is:
a.
the ratio of two variances
b.
a populationparameterÂ Â Â Â Â Â Â Â Â Â
c.
the variance of the difference between means
d.
a ratio of two means
e.
the difference of standard deviations
The characteristics of the F-Distribution include allbut:
a.
it is positively skewed
b.
it is symmetrical much like the normal distribution
c.
its value can never be negative
d.
there is a family of distributions dependent upon the degrees offreedom
e.
it is continuous
Which statement about the F-distribution iscorrect:
a.
it is the same as the t-distribution.
b.
It is always between -1 and +1.
c.
It is always between 0 and 1.
d.
It increases toward infinity as the degrees of freedomincrease.
e.
It cannot be negative.
Analysis of Variance is used to:
a.
compare nominal data.
b.
compare population proportions.
c.
simultaneously compare several population means.
d.
calculate an normal probability.
e.
compute the t test.

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Q1 An F statistic is the ratio of variances Usually a randomvariable which follows a F distribution can be expressed as theratio of 2 independent chi squared distribution divided by theirrespective degrees of freedom The F statistic plays important rolein testing significance of See Answer

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	a.	the ratio of two variances
	b.	a populationparameterÂ Â Â Â Â Â Â Â Â Â
	c.	the variance of the difference between means
	d.	a ratio of two means
	e.	the difference of standard deviations

	a.	it is positively skewed
	b.	it is symmetrical much like the normal distribution
	c.	its value can never be negative
	d.	there is a family of distributions dependent upon the degrees offreedom
	e.	it is continuous

	a.	it is the same as the t-distribution.
	b.	It is always between -1 and +1.
	c.	It is always between 0 and 1.
	d.	It increases toward infinity as the degrees of freedomincrease.
	e.	It cannot be negative.

	a.	compare nominal data.
	b.	compare population proportions.
	c.	simultaneously compare several population means.
	d.	calculate an normal probability.
	e.	compute the t test.