MAT 202 Practice Final Exam ACTUAL UPDATED QUESTIONS AND CORRECT
ANSWERS
The students in a class are given an exam with a Ans: Ratio
maximum score of 100. Their numerical scores are
an example of what type of data? (since a the score is given we know it is not nominal, it is not in order so it is not
ordinal nor is it written in interval form)
80 55 60 80 75 100 60 55 80 70 95 90
These exam scores are an example of ratio data because there is a meaningful
zero point for these data, and because the ratio of two scores is meaningful. That
is, a score of zero on the exam would mean that no questions were answered
correctly, and a score of 90 on the exam would be 50% better than a score of 60.
What is the mode of the values in the table? Ans: 80
The mode is 80 because it is the most frequently-occurring value in the table.
80 55 60 80 75 100 60 55 80 70 95 90
Which situation involves two statistically independent Ans: fair dice thrown at the same time
events?
How many different combinations of 2 students can Using the combination formula,
be chosen from a class of 25, where the order of
selection does not matter? n!/r!(n-r)!
A researcher performs a two-tailed test of the 1.65
hypothesis that a sample mean is greater than zero
at the 90% confidence level. The population variance The z-statistic of z=1.65 would result in a confidence level of 90.1%, because the
is known. What is the critical value of the z-statistic? area under the normal curve between z=0 and z=1.65 corresponds an area of
0.4505. This is as close to a 90% confidence level as a table with only two decimal
places for z allows.
The dean at a university believes that the grade point Not all of the means are equal
average varies across freshman, sophomore, junior,
and senior years. She takes a random sample of 25
students from each year and looks up their grades.
The null hypothesis is
H0: µ₁=µ₂=µ₃
If she is going to use one-way analysis of variance
(ANOVA), what will her alternative hypothesis
Text
be?
ANSWERS
The students in a class are given an exam with a Ans: Ratio
maximum score of 100. Their numerical scores are
an example of what type of data? (since a the score is given we know it is not nominal, it is not in order so it is not
ordinal nor is it written in interval form)
80 55 60 80 75 100 60 55 80 70 95 90
These exam scores are an example of ratio data because there is a meaningful
zero point for these data, and because the ratio of two scores is meaningful. That
is, a score of zero on the exam would mean that no questions were answered
correctly, and a score of 90 on the exam would be 50% better than a score of 60.
What is the mode of the values in the table? Ans: 80
The mode is 80 because it is the most frequently-occurring value in the table.
80 55 60 80 75 100 60 55 80 70 95 90
Which situation involves two statistically independent Ans: fair dice thrown at the same time
events?
How many different combinations of 2 students can Using the combination formula,
be chosen from a class of 25, where the order of
selection does not matter? n!/r!(n-r)!
A researcher performs a two-tailed test of the 1.65
hypothesis that a sample mean is greater than zero
at the 90% confidence level. The population variance The z-statistic of z=1.65 would result in a confidence level of 90.1%, because the
is known. What is the critical value of the z-statistic? area under the normal curve between z=0 and z=1.65 corresponds an area of
0.4505. This is as close to a 90% confidence level as a table with only two decimal
places for z allows.
The dean at a university believes that the grade point Not all of the means are equal
average varies across freshman, sophomore, junior,
and senior years. She takes a random sample of 25
students from each year and looks up their grades.
The null hypothesis is
H0: µ₁=µ₂=µ₃
If she is going to use one-way analysis of variance
(ANOVA), what will her alternative hypothesis
Text
be?
