STATISTICS PORTAGE CNSL 503 1
PRACTICE EXAMINATION 2026
QUESTIONS WITH ANSWERS GRADED
A+
◍ statistical significance.
Answer: when a result is not likely to be from the population (far into
extremity/outlier)
◍ inferential statistics.
Answer: draw conclusions about a population base on sample data
◍ standard deviation.
Answer: the average distance between each score and the mean
◍ The mode is most useful for.....
Answer: variables measured on a nominal scale or to describe the shape of a
distribution (unimodal, bimodal, trimodal)
◍ Describe the interval scale and provide an example..
Answer: when the variable does not have an absolute, or meaningful, zero
(Example: temperature measured in Fahrenheit)
◍ Describe inferential statistics.
Answer: performed in order for researchers to make inferences and
generalizations about populations based on data gathered from samples.
◍ Trimodal distributions have ____ peaks and ____ modes..
Answer: 3;3
◍ what is a grouped frequency distribution table?.
Answer: more concise way to present data when there is a wide range of
, values
◍ The number of hours that a college student studies for final exams is a
quantitative variable. Which statement below justifies this variable type?
A. the number of hours is a count of using whole numbers.
B. The number of hours is a label or category
C. The number of hours is numeric and can be expressed as a decimal or
fraction of a whole number
D. The number of hours a student studies is a characteristic of the student.
Answer: C.
◍ How do you reduce the standard error?.
Answer: increase sample size
◍ What are the four steps of hypothesis testing?.
Answer: 1 State the hypotheses (Ho and Ha) Ho= There is no relationship
between test scores and tutoring. (M= 75)Ha= There is a relationship
between test scores and tutoring. (M=X 75, M>75)2. Establish the decision
criteria (set the alpha level or significance level as 0.05)3. Collect data and
compute sample statistics as well as convert sample statistic into test statistic
(e.g. z-score)4. Make a decision (if p-value <= alpha level, reject the null
hypothesis, the result is statistically significant.)(if p value>= alpha level,
fail to reject the null hypothesis. there is no significant treatment effect).
◍ Why is a frequency table beneficial?.
Answer: can show the number of each occurrence in a relation to the total
number of occurrences, can display qualitative or quantitative data in a
concise way, shows data visually
◍ frequency distribution.
Answer: presents the frequency of every value in a dataset
◍ What type of study is it considered when two samples come from different
groups?.
Answer: Independent measures design
◍ What is the definition of mode?.
PRACTICE EXAMINATION 2026
QUESTIONS WITH ANSWERS GRADED
A+
◍ statistical significance.
Answer: when a result is not likely to be from the population (far into
extremity/outlier)
◍ inferential statistics.
Answer: draw conclusions about a population base on sample data
◍ standard deviation.
Answer: the average distance between each score and the mean
◍ The mode is most useful for.....
Answer: variables measured on a nominal scale or to describe the shape of a
distribution (unimodal, bimodal, trimodal)
◍ Describe the interval scale and provide an example..
Answer: when the variable does not have an absolute, or meaningful, zero
(Example: temperature measured in Fahrenheit)
◍ Describe inferential statistics.
Answer: performed in order for researchers to make inferences and
generalizations about populations based on data gathered from samples.
◍ Trimodal distributions have ____ peaks and ____ modes..
Answer: 3;3
◍ what is a grouped frequency distribution table?.
Answer: more concise way to present data when there is a wide range of
, values
◍ The number of hours that a college student studies for final exams is a
quantitative variable. Which statement below justifies this variable type?
A. the number of hours is a count of using whole numbers.
B. The number of hours is a label or category
C. The number of hours is numeric and can be expressed as a decimal or
fraction of a whole number
D. The number of hours a student studies is a characteristic of the student.
Answer: C.
◍ How do you reduce the standard error?.
Answer: increase sample size
◍ What are the four steps of hypothesis testing?.
Answer: 1 State the hypotheses (Ho and Ha) Ho= There is no relationship
between test scores and tutoring. (M= 75)Ha= There is a relationship
between test scores and tutoring. (M=X 75, M>75)2. Establish the decision
criteria (set the alpha level or significance level as 0.05)3. Collect data and
compute sample statistics as well as convert sample statistic into test statistic
(e.g. z-score)4. Make a decision (if p-value <= alpha level, reject the null
hypothesis, the result is statistically significant.)(if p value>= alpha level,
fail to reject the null hypothesis. there is no significant treatment effect).
◍ Why is a frequency table beneficial?.
Answer: can show the number of each occurrence in a relation to the total
number of occurrences, can display qualitative or quantitative data in a
concise way, shows data visually
◍ frequency distribution.
Answer: presents the frequency of every value in a dataset
◍ What type of study is it considered when two samples come from different
groups?.
Answer: Independent measures design
◍ What is the definition of mode?.
