Business Statistics Final Exam Questions with Complete Answers Rated 100%
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Business Statistics Fnal Exm
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Business Statistics Fnal Exm
Business Statistics Final Exam Questions with Complete Answers Rated 100%
As the sample size ________, the variation of the sampling distribution of ___________.
Increases, decreases
Increases, remains the same
Decreases, remains the same
Decreases, decreases
None of these - An...
Business Statistics Final Exam Questions with Complete Answers Rated 100%
As the sample size ________, the variation of the sampling distribution of ___________.
Increases, decreases
Increases, remains the same
Decreases, remains the same
Decreases, decreases
None of these - Answers Increases, decreases
If a two-sided null hypothesis cannot be rejected for a single mean at a given significance level, then the
corresponding one-sided null hypothesis (i.e., the same sample size, the same standard deviation, and
the same mean) will ________ be rejected at the same significance level.
never
always
sometimes - Answers sometimes
The t distribution approaches the ________ distribution as the sample size ________.
Binomial, decreases
,z, decreases
z, increases
Binomial, increases - Answers z, increases
An event is a collection of sample space outcomes.
True
False - Answers true
An indication of no linear relationship between two variables would be...
a correlation coefficient equal to -1
a correlation coefficient equal to 0
a correlation coefficient equal to 1 - Answers a correlation coefficient equal to 0
Range is a better measure of variation than standard deviation.
True
False - Answers False
The binomial experiment consists of n independent, identical trials, each of which results in either
success or failure and is such that the probability of success on any trial is the same.
,True
False - Answers True
When comparing two independent population means, if n1 = 13 and n2 = 10, degrees of freedom for the
t statistic is 22.
True
False - Answers False
The number of standard deviations that a value x is from the mean is a(n) ________.
z score
Exponential value
Variance
Area - Answers z score
The probability of an event is the sum of the probabilities of the sample space outcomes that
correspond to the event.
True
False - Answers True
A population is a set of existing units.
True
False - Answers True
, A confidence interval for the population mean is an interval constructed around the ________.
z test statistic
Sample mean
t test statistic
Population mean - Answers sample mean
In a binomial experiment, the results of one trial are dependent on the results of other trials.
True
False - Answers false
All continuous random variables are normally distributed.
True
False - Answers false
If all the points in a scatterplot lie on the least squares regression line, then the coefficient of
correlation...
must be 1.0
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