Although it is often associated only with small-sample tests,the t distribution is appropriate when the population standard deviations are unknown,regardless of how large or small the samples happen to be.
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Q2: An example of dependent samples occurs when
Q3: The number of degrees of freedom associated
Q4: The comparison of sample proportions from two
Q5: The z-test approximation to the unequal
Q6: Independent samples are those for which the
Q7: When either test can be applied to
Q8: Comparing the means or proportions from two
Q9: An important factor in choosing between the
Q10: The z-test requires no assumptions about the
Q11: When the population standard deviations are
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