1. Students are being surveyed about the weight of books and supplies they are c
ID: 3150360 • Letter: 1
Question
1. Students are being surveyed about the weight of books and supplies they are carrying as they attend class.
(a) Identify the variable of interest.
gender
weight of books
weight of supplies
weight of books and supplies
(b) Identify the type of variable.
numerical (continuous)
ordinal
discrete
none of the above
(c) List a few values that might occur in a sample. (Select all that apply.)
heaviest
4.55 kg
15.2 lb
5 lb -7 lb
5.67 lb
lightest
2.A drug manufacturer is interested in the proportion of persons who have hypertension (elevated blood pressure) whose condition can be controlled by a new drug the company has developed. A study involving 5150 individuals with hypertension is conducted, and it is found that the proportion of the individuals are able to control their hypertension with the drug is 0.76. Assuming that the 5150 individuals are representative of the group who have hypertension, answer the following questions.
(a) What is the population?
the 5150 people in the study
the drug manufacturer
all individuals who have hypertension
(b) What is the sample?
the 5150 people in the study
the drug manufacturer
all individuals who have hypertension
(c) Identify the parameter of interest.
the proportion of the population for which the drug is effective
the number of individuals in the population for which the drug is effective
the proportion of the sample for which the drug is effectivethe
number of individuals in the sample for which the drug is effective
(d) Identify the statistic.
the number of individuals in the sample for which the drug is effectivethe
number of individuals in the population for which the drug is effective
the proportion of the sample for which the drug is
effectivethe proportion of the population for which the drug is effective
(e) Give the value of the statistic.
(f) Do we know the value of the parameter?
Yes
No
3.The severity of side effects experienced by patients while being treated with a particular medicine is under study. The severity is measured on the scale: none, mild, moderate, severe, very severe.
(a) Name the variable of interest.
presence or absence of side effects
number of side effects
severity of side effects
(b) Identify the type of variable.
nominal
ordinal
quantitative
continuous
4. A study was conducted by Aventis Pharmaceuticals, Inc. to measure the adverse side effects of Allegra, a drug used for the treatment of seasonal allergies. A sample of 679 allergy sufferers in the United States was given 60 mg of the drug twice a day. The patients were to report whether they experienced relief from their allergies as well as any adverse side effects (viral infection, nausea, drowsiness, etc.).†
(a) What is the population being studied?
Aventis Pharmaceuticals
all people suffering from seasonal allergies
the 679 people given the dose
everyone living in the United States
(b) What is the sample?
all people suffering from seasonal allergies
the 679 people given the dose
Aventis Pharmaceuticals
everyone living in the United States
(c) What are the characteristics of interest about each element in the population?
relief status
side effects
both of these
neither of these
(d) Are the data collected qualitative or quantitative?
qualitative
quantitative
5. The admissions office wants to estimate the cost of textbooks for students at our college. Let the variable x be the total cost of all textbooks purchased by a student this semester. The plan is to randomly identify 100 students and obtain their total textbook costs. The average cost for the 100 students will be used to estimate the average cost for all students.
(a) Describe the parameter the admissions office wishes to estimate.
total cost of textbook
saverage cost of textbooks
number of students purchasing textbooks
(b) Describe the population.
total cost of textbooks
average cost of textbooks
all students enrolled for the semester
students purchasing textbooks
(c) Describe the variable of interest.
cost of textbooks
number of students purchasing textbooks
(d) Describe the sample.
all students enrolled for the semester
100 students that were randomly identified
average cost of textbooks
(e) Describe the statistic and how you would use the 100 data values collected to calculate the statistic.
average cost of textbooks, add 100 values and divide by 100
total cost of textbooks, add 100 values
average cost of textbooks, add 100 values
total cost of textbooks, add 100 values and divide by 100
Explanation / Answer
1. Students are being surveyed about the weight of books and supplies they are carrying as they attend class.
(a) Identify the variable of interest.
gender
weight of books
weight of supplies
weight of books and supplies
(b) Identify the type of variable.
numerical (continuous)
ordinal
discrete
none of the above
(c) List a few values that might occur in a sample. (Select all that apply.)
heaviest
4.55 kg
15.2 lb
5 lb -7 lb
5.67 lb
lightest
2.A drug manufacturer is interested in the proportion of persons who have hypertension (elevated blood pressure) whose condition can be controlled by a new drug the company has developed. A study involving 5150 individuals with hypertension is conducted, and it is found that the proportion of the individuals are able to control their hypertension with the drug is 0.76. Assuming that the 5150 individuals are representative of the group who have hypertension, answer the following questions.
(a) What is the population?
the 5150 people in the study
the drug manufacturer
all individuals who have hypertension
(b) What is the sample?
the 5150 people in the study
the drug manufacturer
all individuals who have hypertension
(c) Identify the parameter of interest.
the proportion of the population for which the drug is effective
the number of individuals in the population for which the drug is effective
the proportion of the sample for which the drug is effectivethe
number of individuals in the sample for which the drug is effective
(d) Identify the statistic.
the number of individuals in the sample for which the drug is effectivethe
number of individuals in the population for which the drug is effective
the proportion of the sample for which the drug is effective
the proportion of the population for which the drug is effective
(e) Give the value of the statistic.
(f) Do we know the value of the parameter?
Yes
No
3.The severity of side effects experienced by patients while being treated with a particular medicine is under study. The severity is measured on the scale: none, mild, moderate, severe, very severe.
(a) Name the variable of interest.
presence or absence of side effects
number of side effects
severity of side effects
(b) Identify the type of variable.
nominal
ordinal
quantitative
continuous
4. A study was conducted by Aventis Pharmaceuticals, Inc. to measure the adverse side effects of Allegra, a drug used for the treatment of seasonal allergies. A sample of 679 allergy sufferers in the United States was given 60 mg of the drug twice a day. The patients were to report whether they experienced relief from their allergies as well as any adverse side effects (viral infection, nausea, drowsiness, etc.).†
(a) What is the population being studied?
Aventis Pharmaceuticals
all people suffering from seasonal allergies
the 679 people given the dose
everyone living in the United States
(b) What is the sample?
all people suffering from seasonal allergies
the 679 people given the dose
Aventis Pharmaceuticals
everyone living in the United States
(c) What are the characteristics of interest about each element in the population?
relief status
side effects
both of these
neither of these
(d) Are the data collected qualitative or quantitative?
qualitative
quantitative
5. The admissions office wants to estimate the cost of textbooks for students at our college. Let the variable x be the total cost of all textbooks purchased by a student this semester. The plan is to randomly identify 100 students and obtain their total textbook costs. The average cost for the 100 students will be used to estimate the average cost for all students.
(a) Describe the parameter the admissions office wishes to estimate.
total cost of textbook
saverage cost of textbooks
number of students purchasing textbooks
(b) Describe the population.
total cost of textbooks
average cost of textbooks
all students enrolled for the semester
students purchasing textbooks
(c) Describe the variable of interest.
cost of textbooks
number of students purchasing textbooks
(d) Describe the sample.
all students enrolled for the semester
100 students that were randomly identified
average cost of textbooks
(e) Describe the statistic and how you would use the 100 data values collected to calculate the statistic.
average cost of textbooks, add 100 values and divide by 100
total cost of textbooks, add 100 values
average cost of textbooks, add 100 values
total cost of textbooks, add 100 values and divide by 100
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