MATH 1280 Introduction to Statistics Exam | Verified Exam Questions
and Answers | Latest Updated Study Material 2026
Question:
MATH 1280 Introduction to Statistics Exam | Comprehensive
The population in this survey is:
Answer:
The target of the survey is to
assess the service that costumers get at the dealerships.
Question:
The
Answer:
is: Customers that arrive at dealerships of the company.
Question:
The sample in this survey is:
Answer:
that arrive at the selected
dealerships during the day of visit.
Question:
A parameter that may be targeted by this survey is:
Answer:
The
percentage of costumers that possess a car made by the company.
Question:
A statistic that may be used to summarize the outcome of the survey is:
Answer:
The percentage, among costumers that were interviewed, of those that do not
possess a car made by the company
,Question:
The data used to produce the tables and plots is:
Answer:
A sample.
Question:
The average number of calls that arrived between 8:00 AM and 8:10 AM during the working
days of any month is:
Answer:
A parameter.
Question:
The average number of calls recorded in the object "Feb" is 5.85. The average in the object "Sep"
is 8.5. The difference between these two numbers is:
Answer:
A statistic.
Question:
In which of the months the number of incoming calls between 8:00 AM and 8:10 AM tends to be
smaller?
Answer:
February.
Question:
The height of the fourth bar from the left of the bar plot for the month of February represents the
fact that?
Answer:
In 4 of the days of the month of February there were 5
incoming calls.
Question:
The location of the highest bar of the bar plot for the month of September represents the fact
that?
Answer:
10 incoming calls came during 6 days of the month of
September.
, Question:
The next two questions refer to the following relative frequency table on hurricanes that have
made direct hits on the U.S. between 1851 and 2004. Hurricanes are given a strength category
rating based on the minimum wind speed generated by the storm.
(http://www.nhc.noaa.gov/gifs/table5.gif ) (ALTERNATE DOWNLOAD LINK)
Answer:
Question:
What is the relative frequency of direct hits that were category 2 hurricanes?
Answer:
0.2637
Question:
The relative frequency of direct hits that were AT LEAST a category 3 storm is
Answer:
0.337
Question:
Sixty adults with gum disease were asked the number of times per week they used to floss before
their diagnoses. The (incomplete) results are shown below:
Flossing Frequency for Adults with Gum Disease# per WeekFreq.Relative Freq.Cum. Relative
Freq.0270.4500 118 3 0.933363 710.0167
Fill in the blanks in the table and answer the next two question: (The numerical answer that you
provide should be of the form "0.xxxx", with 4 digits to the right of the zero.)
Answer:
Question:
The relative frequency that flossed 6 times per week is:
Answer:
0.05
Question:
The relative frequency that flossed at least once a week is:
and Answers | Latest Updated Study Material 2026
Question:
MATH 1280 Introduction to Statistics Exam | Comprehensive
The population in this survey is:
Answer:
The target of the survey is to
assess the service that costumers get at the dealerships.
Question:
The
Answer:
is: Customers that arrive at dealerships of the company.
Question:
The sample in this survey is:
Answer:
that arrive at the selected
dealerships during the day of visit.
Question:
A parameter that may be targeted by this survey is:
Answer:
The
percentage of costumers that possess a car made by the company.
Question:
A statistic that may be used to summarize the outcome of the survey is:
Answer:
The percentage, among costumers that were interviewed, of those that do not
possess a car made by the company
,Question:
The data used to produce the tables and plots is:
Answer:
A sample.
Question:
The average number of calls that arrived between 8:00 AM and 8:10 AM during the working
days of any month is:
Answer:
A parameter.
Question:
The average number of calls recorded in the object "Feb" is 5.85. The average in the object "Sep"
is 8.5. The difference between these two numbers is:
Answer:
A statistic.
Question:
In which of the months the number of incoming calls between 8:00 AM and 8:10 AM tends to be
smaller?
Answer:
February.
Question:
The height of the fourth bar from the left of the bar plot for the month of February represents the
fact that?
Answer:
In 4 of the days of the month of February there were 5
incoming calls.
Question:
The location of the highest bar of the bar plot for the month of September represents the fact
that?
Answer:
10 incoming calls came during 6 days of the month of
September.
, Question:
The next two questions refer to the following relative frequency table on hurricanes that have
made direct hits on the U.S. between 1851 and 2004. Hurricanes are given a strength category
rating based on the minimum wind speed generated by the storm.
(http://www.nhc.noaa.gov/gifs/table5.gif ) (ALTERNATE DOWNLOAD LINK)
Answer:
Question:
What is the relative frequency of direct hits that were category 2 hurricanes?
Answer:
0.2637
Question:
The relative frequency of direct hits that were AT LEAST a category 3 storm is
Answer:
0.337
Question:
Sixty adults with gum disease were asked the number of times per week they used to floss before
their diagnoses. The (incomplete) results are shown below:
Flossing Frequency for Adults with Gum Disease# per WeekFreq.Relative Freq.Cum. Relative
Freq.0270.4500 118 3 0.933363 710.0167
Fill in the blanks in the table and answer the next two question: (The numerical answer that you
provide should be of the form "0.xxxx", with 4 digits to the right of the zero.)
Answer:
Question:
The relative frequency that flossed 6 times per week is:
Answer:
0.05
Question:
The relative frequency that flossed at least once a week is:
