BNAL 306 FINAL QUESTIONS AND VERIFIED
ANSWERS
ABC Batteries claims their long life batteries last at least 100 hours. We randomly select
50 long life batteries and find they have mean life of 100.6 hours with a standard
deviation of 20.2 hours. At the 0.05 significance level test ABC Batteries' claim.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - a) t Test of Hypothesis for the Mean
A local gym is sponsoring a diet contest. Each of the 20 participants is weighed prior to
the start of the contest and then again at the end of the contest. At the 0.01 level of
significance, is there a difference between the mean weight of the participants before
and after the contest?
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - d) Paired t Test
Is there a difference between SAT scores of public, private and homeschooled
students? 20 of each type of student are randomly selected and their SAT scores are
recorded. At the 0.05 significance level, is there a difference among the mean SAT
scores of the groups?
, a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - f) One -Way ANOVA F test for the Differences
Among More Than Two Means
Pizzaz Pizza claims that more college students like their pizza over the competition. We
randomly select 100 college students and find that 63 of them prefer Pizzaz Pizza. At
the 0.10 level of significance, test the claim that more students prefer Pizzaz Pizza.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - b) Z Test of Hypothesis for the Proportion
We want to come up with a linear model to predict a student's GPA at ODU based on
their high school GPA, SAT score and number of high school activities.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
L) Multiple Regression - Answers - L) Multiple Regression
ANSWERS
ABC Batteries claims their long life batteries last at least 100 hours. We randomly select
50 long life batteries and find they have mean life of 100.6 hours with a standard
deviation of 20.2 hours. At the 0.05 significance level test ABC Batteries' claim.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - a) t Test of Hypothesis for the Mean
A local gym is sponsoring a diet contest. Each of the 20 participants is weighed prior to
the start of the contest and then again at the end of the contest. At the 0.01 level of
significance, is there a difference between the mean weight of the participants before
and after the contest?
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - d) Paired t Test
Is there a difference between SAT scores of public, private and homeschooled
students? 20 of each type of student are randomly selected and their SAT scores are
recorded. At the 0.05 significance level, is there a difference among the mean SAT
scores of the groups?
, a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - f) One -Way ANOVA F test for the Differences
Among More Than Two Means
Pizzaz Pizza claims that more college students like their pizza over the competition. We
randomly select 100 college students and find that 63 of them prefer Pizzaz Pizza. At
the 0.10 level of significance, test the claim that more students prefer Pizzaz Pizza.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
l) Multiple Regression - Answers - b) Z Test of Hypothesis for the Proportion
We want to come up with a linear model to predict a student's GPA at ODU based on
their high school GPA, SAT score and number of high school activities.
a) t Test of Hypothesis for the Mean
b) Z Test of Hypothesis for the Proportion
c) Pool-Variance t Test for the Difference Between Two Means
d) Paired t Test
e) Z test for the Differences Between Two Proportions
f) One -Way ANOVA F test for the Differences Among More Than Two Means
g) Chi-Square Test for Differences Among More Than Two Proportions
h) Chi-Square Test for Independence
i) Time Series Forecasting
j) Correlation Analysis
k) Simple Linear Regression
L) Multiple Regression - Answers - L) Multiple Regression
