1
MATH 1280 INTRODUCTION TO STATISTICS /
需要写什么主题需要写什么主题的中文作文，是写故
QUESTIONS WITH DETAILED VERIFIED ANSWERS /
事、议论文、记叙文，还是其他类型？另外，作文的
ALREADY GRADED A / 2025.
字数要求是多少呢？需要写什么主题的中文作文，是
The population in this survey is: - (answers)The target of the survey is to assess
the 写故事、议论文、记叙文，还是其他类型？另外，作
service that costumers get at the dealerships.
文的字数要求是多少呢？的中文作文，是写故事、议
The correct answer is: Customers that arrive at dealerships of the company.
论文、记叙文，还是其他类型？另外，作文的字数要
求是多少呢？
The sample in this survey is: - (answers)that arrive at the selected dealerships
during the day of visit.
A parameter that may be targeted by this survey is: - (answers)The percentage
of costumers that possess a car made by the company.
A statistic that may be used to summarize the outcome of the survey is: -
(answers)The percentage, among costumers that were interviewed, of those
that do not possess a car made by the company
The data used to produce the tables and plots is: - (answers)A sample.
The average number of calls that arrived between 8:00 AM and 8:10 AM during
the working days of any month is: - (answers)A parameter.
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: -
(answers)A statistic.
In which of the months the number of incoming calls between 8:00 AM and
8:10 AM tends to be smaller? - (answers)February.
, 2
需要写什么主题需要写什么主题的中文作文，是写故
The height of the fourth bar from the left of the bar plot for the month of
事、议论文、记叙文，还是其他类型？另外，作文的
February represents the fact that? - (answers)In 4 of the days of the month of
字数要求是多少呢？需要写什么主题的中文作文，是
February there were 5 incoming calls.
写故事、议论文、记叙文，还是其他类型？另外，作
文的字数要求是多少呢？的中文作文，是写故事、议
The location of the highest bar of the bar plot for the month of September
论文、记叙文，还是其他类型？另外，作文的字数要
represents the fact that? - (answers)10 incoming calls came during 6 days of
求是多少呢？
the month of September.
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) - (answers)
What is the relative frequency of direct hits that were category 2 hurricanes? -
(answers)0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is -
(answers)0.337
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.) - (answers)
, 3
The relative frequency that flossed 6 times per week is: - (answers)0.05
需要写什么主题需要写什么主题的中文作文，是写故
事、议论文、记叙文，还是其他类型？另外，作文的
The relative frequency that flossed at least once a week is: - (answers)0.55
字数要求是多少呢？需要写什么主题的中文作文，是
写故事、议论文、记叙文，还是其他类型？另外，作
The文的字数要求是多少呢？的中文作文，是写故事、议
number of malfunctioning products per production series was recorded for
several production series. The data was entered into an R object by the name
论文、记叙文，还是其他类型？另外，作文的字数要
"malfunction". The next 3 questions refer to the following R code: - (answers)
求是多少呢？
The sample size is: - (answers)72
The frequency of production series where there are 4 malfunctioning products
is: - (answers)16
The frequency of production series where there are less than 7 malfunctioning
products is: - (answers)70
The file "ex2.csv" contains information on the blood pressure of a group of
healthy individuals. The file is located in
http://pluto.huji.ac.il/~msby/StatThink/Datasets/ex2.csv. (ALTERNATE
DOWNLOAD LINK) Read the data into R and answer the following 4 questions -
(answers)
The number of variables is: - (answers)7
The type of the variable "id" is: - (answers)factor
The type of the variable "sex" is: - (answers)factor
MATH 1280 INTRODUCTION TO STATISTICS /
需要写什么主题需要写什么主题的中文作文，是写故
QUESTIONS WITH DETAILED VERIFIED ANSWERS /
事、议论文、记叙文，还是其他类型？另外，作文的
ALREADY GRADED A / 2025.
字数要求是多少呢？需要写什么主题的中文作文，是
The population in this survey is: - (answers)The target of the survey is to assess
the 写故事、议论文、记叙文，还是其他类型？另外，作
service that costumers get at the dealerships.
文的字数要求是多少呢？的中文作文，是写故事、议
The correct answer is: Customers that arrive at dealerships of the company.
论文、记叙文，还是其他类型？另外，作文的字数要
求是多少呢？
The sample in this survey is: - (answers)that arrive at the selected dealerships
during the day of visit.
A parameter that may be targeted by this survey is: - (answers)The percentage
of costumers that possess a car made by the company.
A statistic that may be used to summarize the outcome of the survey is: -
(answers)The percentage, among costumers that were interviewed, of those
that do not possess a car made by the company
The data used to produce the tables and plots is: - (answers)A sample.
The average number of calls that arrived between 8:00 AM and 8:10 AM during
the working days of any month is: - (answers)A parameter.
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: -
(answers)A statistic.
In which of the months the number of incoming calls between 8:00 AM and
8:10 AM tends to be smaller? - (answers)February.
, 2
需要写什么主题需要写什么主题的中文作文，是写故
The height of the fourth bar from the left of the bar plot for the month of
事、议论文、记叙文，还是其他类型？另外，作文的
February represents the fact that? - (answers)In 4 of the days of the month of
字数要求是多少呢？需要写什么主题的中文作文，是
February there were 5 incoming calls.
写故事、议论文、记叙文，还是其他类型？另外，作
文的字数要求是多少呢？的中文作文，是写故事、议
The location of the highest bar of the bar plot for the month of September
论文、记叙文，还是其他类型？另外，作文的字数要
represents the fact that? - (answers)10 incoming calls came during 6 days of
求是多少呢？
the month of September.
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) - (answers)
What is the relative frequency of direct hits that were category 2 hurricanes? -
(answers)0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is -
(answers)0.337
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.) - (answers)
, 3
The relative frequency that flossed 6 times per week is: - (answers)0.05
需要写什么主题需要写什么主题的中文作文，是写故
事、议论文、记叙文，还是其他类型？另外，作文的
The relative frequency that flossed at least once a week is: - (answers)0.55
字数要求是多少呢？需要写什么主题的中文作文，是
写故事、议论文、记叙文，还是其他类型？另外，作
The文的字数要求是多少呢？的中文作文，是写故事、议
number of malfunctioning products per production series was recorded for
several production series. The data was entered into an R object by the name
论文、记叙文，还是其他类型？另外，作文的字数要
"malfunction". The next 3 questions refer to the following R code: - (answers)
求是多少呢？
The sample size is: - (answers)72
The frequency of production series where there are 4 malfunctioning products
is: - (answers)16
The frequency of production series where there are less than 7 malfunctioning
products is: - (answers)70
The file "ex2.csv" contains information on the blood pressure of a group of
healthy individuals. The file is located in
http://pluto.huji.ac.il/~msby/StatThink/Datasets/ex2.csv. (ALTERNATE
DOWNLOAD LINK) Read the data into R and answer the following 4 questions -
(answers)
The number of variables is: - (answers)7
The type of the variable "id" is: - (answers)factor
The type of the variable "sex" is: - (answers)factor
