Quiz
Week 2: Exercises and Homework Problems
1. Of the adult U.S. population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy.
a. Describe the population.
b. What is the sample?
c. Describe the variable.
d. Identify the statistic and give its value.
e. Identify the parameter and give its value.
2. (HWK) 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 5000 individuals with hypertension is conducted, and it is found that 80% of the individuals are able to control their hypertension with the drug. Assuming that the 5000 individuals are representative of the group who have hypertension, answer the following questions:
a. What is the population?
b. What is the sample?
c. Identify the parameter of interest.
d. Identify the statistic and give its value.
e. Do we know the value of the parameter?
3. A quality-control technician selects assembled parts from an assembly line and records the following information concerning each part: A: defective or non-defective B: the employee number of the individual who assembled the part C: the weight of the part
a. What is the population?
b. Is the population finite or infinite?
c. What is the sample?
d. Classify the three variables as either attribute or numerical.
4. (HWK) Select 10 students currently enrolled at your college and collect data for these three variables: X: number of courses enrolled in Y: total cost of textbooks and supplies for courses Z: method of payment used for textbooks and supplies
a. What is the population?
b. Is the population
1. Of the adult U.S. population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy.
a. Describe the population.
b. What is the sample?
c. Describe the variable.
d. Identify the statistic and give its value.
e. Identify the parameter and give its value.
2. (HWK) 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 5000 individuals with hypertension is conducted, and it is found that 80% of the individuals are able to control their hypertension with the drug. Assuming that the 5000 individuals are representative of the group who have hypertension, answer the following questions:
a. What is the population?
b. What is the sample?
c. Identify the parameter of interest.
d. Identify the statistic and give its value.
e. Do we know the value of the parameter?
3. A quality-control technician selects assembled parts from an assembly line and records the following information concerning each part: A: defective or non-defective B: the employee number of the individual who assembled the part C: the weight of the part
a. What is the population?
b. Is the population finite or infinite?
c. What is the sample?
d. Classify the three variables as either attribute or numerical.
4. (HWK) Select 10 students currently enrolled at your college and collect data for these three variables: X: number of courses enrolled in Y: total cost of textbooks and supplies for courses Z: method of payment used for textbooks and supplies
a. What is the population?
b. Is the population