MATH 1280 INTRODUCTION TO
STATISTICS QUESTIONS WITH
COMPLETE SOLUTIONS GUARANTEED
SUCCESS!!!
Q: Who is the population in this survey targeting customer service at
dealerships?
A: Customers who visit the company's dealerships.
Q: What represents the sample in this survey?
A: Customers who visit selected dealerships on the specific survey day.
Q: What is a possible parameter this survey aims to measure?
A: The proportion of all dealership customers who own a car manufactured by the
company.
Q: What is a statistic that might be calculated from this survey?
A: The percentage of surveyed customers who do not own a vehicle made by the
company.
Q: What type of data is used to create the charts and tables from the survey?
A: Sample data.
Q: What kind of measure is the average number of calls received from 8:00
AM to 8:10 AM across all workdays in a month?
A: A parameter.
Q: The average number of calls in February is 5.85 and in September is 8.5.
What is the difference considered to be?
A: A statistic.
Q: Based on call data, which month saw fewer calls between 8:00 AM and
8:10 AM?
A: February.
Q: What does the fourth bar from the left in February’s bar graph represent?
A: There were 5 calls on 4 different days in February.
,Q: What does the tallest bar in September’s bar chart signify?
A: That 10 calls were received on 6 separate days in 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) - ANSWER✔✔
What is the relative frequency of direct hits that were category 2 hurricanes? -
ANSWER✔✔0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is -
ANSWER✔✔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.) - ANSWER✔✔
The relative frequency that flossed 6 times per week is: - ANSWER✔✔0.05
The relative frequency that flossed at least once a week is: - ANSWER✔✔0.55
The number of malfunctioning products per production series was recorded for
several production series. The data was entered into an R object by the name
"malfunction". The next 3 questions refer to the following R code: - ANSWER✔✔
The sample size is: - ANSWER✔✔72
The frequency of production series where there are 4 malfunctioning products is: -
ANSWER✔✔16
The frequency of production series where there are less than 7 malfunctioning
products is: - ANSWER✔✔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 -
ANSWER✔✔
The number of variables is: - ANSWER✔✔7
The type of the variable "id" is: - ANSWER✔✔factor
The type of the variable "sex" is: - ANSWER✔✔factor
The type of the variable "diastolic" is: - ANSWER✔✔numeric
A study was done to determine the age, type of activity, number of times per week
and the duration (amount of time) of resident use of a local park in San Jose. The
first house in the neighborhood around the park was selected randomly and then
every 8th house in the neighborhood around the park was interviewed. Answer the
following 2 questions: - ANSWER✔✔
"Age" is what type of data? - ANSWER✔✔quantitative/numeric
"Type of activity" is what type of data? - ANSWER✔✔qualitative/factor
Identify the type of data that would be used to describe a response for each of the
items below: - ANSWER✔✔
Number of tickets sold to a concert. - ANSWER✔✔quantitative/numeric
Favorite baseball team. - ANSWER✔✔qualitative/factor
Number of students enrolled at Evergreen Valley College. -
ANSWER✔✔quantitative/numeric
Distance to the closest movie theater. - ANSWER✔✔quantitative/numeric
STATISTICS QUESTIONS WITH
COMPLETE SOLUTIONS GUARANTEED
SUCCESS!!!
Q: Who is the population in this survey targeting customer service at
dealerships?
A: Customers who visit the company's dealerships.
Q: What represents the sample in this survey?
A: Customers who visit selected dealerships on the specific survey day.
Q: What is a possible parameter this survey aims to measure?
A: The proportion of all dealership customers who own a car manufactured by the
company.
Q: What is a statistic that might be calculated from this survey?
A: The percentage of surveyed customers who do not own a vehicle made by the
company.
Q: What type of data is used to create the charts and tables from the survey?
A: Sample data.
Q: What kind of measure is the average number of calls received from 8:00
AM to 8:10 AM across all workdays in a month?
A: A parameter.
Q: The average number of calls in February is 5.85 and in September is 8.5.
What is the difference considered to be?
A: A statistic.
Q: Based on call data, which month saw fewer calls between 8:00 AM and
8:10 AM?
A: February.
Q: What does the fourth bar from the left in February’s bar graph represent?
A: There were 5 calls on 4 different days in February.
,Q: What does the tallest bar in September’s bar chart signify?
A: That 10 calls were received on 6 separate days in 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) - ANSWER✔✔
What is the relative frequency of direct hits that were category 2 hurricanes? -
ANSWER✔✔0.2637
The relative frequency of direct hits that were AT LEAST a category 3 storm is -
ANSWER✔✔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.) - ANSWER✔✔
The relative frequency that flossed 6 times per week is: - ANSWER✔✔0.05
The relative frequency that flossed at least once a week is: - ANSWER✔✔0.55
The number of malfunctioning products per production series was recorded for
several production series. The data was entered into an R object by the name
"malfunction". The next 3 questions refer to the following R code: - ANSWER✔✔
The sample size is: - ANSWER✔✔72
The frequency of production series where there are 4 malfunctioning products is: -
ANSWER✔✔16
The frequency of production series where there are less than 7 malfunctioning
products is: - ANSWER✔✔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 -
ANSWER✔✔
The number of variables is: - ANSWER✔✔7
The type of the variable "id" is: - ANSWER✔✔factor
The type of the variable "sex" is: - ANSWER✔✔factor
The type of the variable "diastolic" is: - ANSWER✔✔numeric
A study was done to determine the age, type of activity, number of times per week
and the duration (amount of time) of resident use of a local park in San Jose. The
first house in the neighborhood around the park was selected randomly and then
every 8th house in the neighborhood around the park was interviewed. Answer the
following 2 questions: - ANSWER✔✔
"Age" is what type of data? - ANSWER✔✔quantitative/numeric
"Type of activity" is what type of data? - ANSWER✔✔qualitative/factor
Identify the type of data that would be used to describe a response for each of the
items below: - ANSWER✔✔
Number of tickets sold to a concert. - ANSWER✔✔quantitative/numeric
Favorite baseball team. - ANSWER✔✔qualitative/factor
Number of students enrolled at Evergreen Valley College. -
ANSWER✔✔quantitative/numeric
Distance to the closest movie theater. - ANSWER✔✔quantitative/numeric
