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BESC 3010 Final Exam with Complete Solutions
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BESC 3010 Final Exam with Complete Solutions
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BESC 3010 Final Exam with CompleteSolutions
1 Most data sets in social science studies are from ____.
a. samples
b. mentally ill people
c. populations
d. outliers Correct Ans-samples
2 a sampling distribution of means is:
a. a population distribution
b. a distribution of means from many samples
d. highly skewed
d. always generalizable Correct Ans-a distribution of means from many samples
3 The sample mean is a(n) ______ of the population mean.
a. inflation-controlled estimate
b. overestimate
c. underestimate
d. unbiased point estimate Correct Ans-unbiased point estimate
4 According to the central limit theorem, it is safe to assume that given an infinite number of
samples:
a. the shape of the distribution of sample means will approximate a normal curve if the sample
size (n) used to calculate each mean > or = 30.
b. the shape of the distribution of sample means will approximate a skewed distribution if the
sample size (n) used to calculate each mean is > or = 30.
c. it is safe to assume both A and B
,d. We can neither assume A nor B Correct Ans-the shape of the distribution of sample
means will approximate a skewed distribution if the sample size (n) used to calculate each mean
> or = to 30.
5 In hypothesis testing, if the null hypothesis has been rejected, what hypothesis do we
assume?
a. the advanced hypothesis
b. the alternative hypothesis
d. the dissimilar hypothesis
d. the modern hypothesis Correct Ans-the alternative hypothesis
6 In null hypothesis testing, if the critical value is less extreme than the observed value (i.e., test
value), then:
a. the null hypothesis is rejected
b. the null hypothesis is important
c. the null hypothesis is true
d. the null hypothesis is retained (i.e., not rejected) Correct Ans-the null hypothesis is
rejected
7 which of the following is always true for "statistically significant" results?
a. the results are important
b. the p-value is higher than alpha
c. the null hypothesis is not rejected (i.e., retained)
d. none of the above Correct Ans-d. none of the above
8 which of the following statements below is inappropriate when discussing results of statistical
significance tests?
a. the null hypothesis has been proven true
b. that the null hypothesis has been rejected
, c. that the null hypothesis has been retained (i.e., not rejected)
d. all of the above are appropriate statements for reporting null hypothesis results Correct
Ans-the null hypothesis has been proven true
9 What would be the advantage of increasing n in null hypothesis significance testing?
a. cohen's d will be greater
b. it would make conducting a one-tailed test easier
c. the null hypothesis would be more likely to be rejected
d. the range of scores would be easier to manage Correct Ans-the null hypothesis would be
more likely to be rejected
bigger sample more likely to be statistical significant.
#43 p-values are
a. influenced by sample size
b. usually the same value as effect sizes
c. always greater than 1
d. the same as alpha values Correct Ans-influenced by sample size
#44 which of the following is an impossible value for both p and alpha? Correct Ans-.00
#45 If we use alpha as the criteria or critical value for the maximum probability of incorrectly
rejecting the null hypothesis, then when the p-value is less than alpha:
a. the null hypothesis is retained (not rejected)
b. the null hypothesis is true
c. the null hypothesis is rejected
d. the data set was incorrectly interpreted Correct Ans-the null hypothesis is rejected
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