1. Which of the following is an example of descriptive statistics and which is an example of inferential statistics?

a. In a Gallup poll conducted April 1-9, 2019, participants were asked to rate their current financial situation as excellent, good, only fair, or poor. The following table lists the summary of the responses of these participants. The results are based on telephone interviews with a random sample of 1012 adults, ages 18 and over, living in all 50 states and the District of Columbia. Assume that the maximum margin of error is 4%. (www.gallup.com.)

Rating		Percent of Respondents
Excellent		12%
Good		44%
Only fair		29%
Poor		15%

This is an example of Choose your answer; descriptive, inferential descriptiveinferential statistics.

b. The following table gives the earnings of the world's top seven female professional athletes for the year 2019 (Source: www.forbes.com).

Female Professional Athlete		2019 Earnings (millions of dollars)
Serena Williams		29.2
Naomi Osaka		24.3
Angelique Kerber		11.8
Simona Halep		10.2
Sloane Stephens		9.6
Caroline Wozniacki		7.5
Maria Sharapova		7.0

This is an example of Choose your answer; descriptive, inferential descriptiveinferential statistics.

2. The following table lists the number of deaths by cause as reported by the Centers for Disease Control and Prevention on September 10, 2017 (Source: www.cdc.gov).

Cause of Death	Number of Deaths
Heart disease	647,457
Cancer	599,108
Accidents	169,936
Chronic lower respiratory diseases	160,201
Stroke	146,383
Alzheimer's disease	121,404
Diabetes	83,564
Influenza and Pneumonia	55,672
Nephritis	50,633

a. What is the variable for this data set? Choose your answer; What is the variable for this data set? The number of deaths from each disease.The cause of death from each disease.The cause of death.The number of deaths.

b. How many observations are in this data set? Enter you answer; How many observations are in this data set?

c. How many elements does this data set contain? Enter you answer; How many elements does this data set contain?

3. Indicate if the following variable is quantitative or qualitative. The amount of time a student spent studying for an exam is a Choose the answer from the menu in accordance to the question statement quantitativequalitative variable.

4. Indicate if the following variable is quantitative or qualitative. The amount of rain last year in 30 cities is a Choose the answer from the menu in accordance to the question statement qualitativequantitative variable.

5. Indicate if the following variable is quantitative or qualitative. The arrival status of airline flights (early, on time, late, canceled) at an airport is a Choose the answer from the menu in accordance to the question statement qualitativequantitative variable.

6. Indicate if the following variable is quantitative or qualitative. A person's blood type is a Choose the answer from the menu in accordance to the question statement quantitativequalitative variable.

7. Indicate if the following variable is quantitative or qualitative. The amount of gasoline put into a car at a gas station is a Choose the answer from the menu in accordance to the question statement quantitativequalitative variable

8. Explain the difference between cross-section and time-series data. Give an example of each of these two types of data.

Cross-section data

Definition: Choose your answer; Definition Data collected on different elements at the same point in time or for the same period of time.Data collected on the same element for the same variable at different points in time or for different periods of time.

Example: Choose your answer; Example Total sales for the 2011 Christmas season at 10 stores in a particular mall.Total sales for one particular store for the Christmas season for the years 2005 to 2011.

Time-series data

Definition: Choose your answer; Definition Data collected on different elements at the same point in time or for the same period of time.Data collected on the same element for the same variable at different points in time or for different periods of time.

Example:

9. Indicate which of the following are time-series data. 1. Food bill of a family for each month of 2015. 2. Number of accidents each year in Dallas from 2000 to 2015. 3. Average prices of houses in 100 cities. 4. Salaries of 50 employees. 5. Number of traffic accidents in California each year from 1985 to 2015.

1, 2 and 5

3 and 4

1, 2 and 3

1, 3 and 5

10. Explain whether the following constitutes a population or a sample. The number of pizzas ordered on Fridays during 2019 at all of the pizza parlors in your town constitutes a Choose the answer from the menu in accordance to the question statement samplepopulation.

11. Explain whether the following constitutes a population or a sample. The dollar value of auto insurance claims filed in 2019 for 400 randomly selected policies constitutes a Choose the answer from the menu in accordance to the question statement samplepopulation.

12. Explain whether the following constitutes a population or a sample. The opening price of each of the 500 stocks in the S&P 500 stock index on January 4, 2019 constitutes a Choose the answer from the menu in accordance to the question statement samplepopulation

13. Explain whether the following constitutes a population or a sample. The total home attendance for each of the 18 teams in Major League Soccer during the 2019 season constitutes a Choose the answer from the menu in accordance to the question statement 14. Explain whether the following constitutes a population or a sample. The living areas of 35 houses listed for sale on March 7, 2019 in Chicago, Illinois constitutes a Choose the answer from the menu in accordance to the question statement 15.