Question

(15 points) A survey was conducted to study the smoking habits of UK residents. Below is a data matrix displaying a portionof the data collected in this survey. Note that the values in amt_Weekends and amt_Weekdays are the number of cigarettes smoked per day, and "N/A" refers to a missing component of the data.

subject_ID	gender	age	marital	gross_Income	smoke	amt_Weekends	amt_Weekdays
1	Female	42	Single	Under 2,600	Yes	12	12
2	Male	44	Single	10,400 to 15,600	No	N/A	N/A
...	...	...	...	...	...	...	...
1691	Male	40	Single	2,600 to 5,200	Yes	8	8

1. What does each row of the data matrix represent?

A. Each row represents a range of values for income.
B. Each row represents one case, that is, one individual or one UK resident.
C. Each row represents one variable in the study.
D. Each row represents a smoking habit in the study.

2. How many participants were included in the study?

3. Indicate whether each variable in the study is numerical or categorical. If numerical, identify as continuous or discrete. If categorical, indicate if the variable is ordinal.

      a. The variable gender is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      b. The variable age is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      c. The variable marital is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      d. The variable grossIncome is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      e. The variable smoke is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      f. The variable amtWeekends is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

      g. The variable amtWeekdays is  ? numerical categorical  and  ? discrete continuous ordinal not ordinal .

Answer 1

Answers

Q1] B) Each row represents one case, that is one individual or one UK resident,

Q2] There are 1691 participants included in the study.

Q3] class of each variable

a] gender -- Categorical and not Ordinal

b] age -- Numerical and Descret

c] marital -- Categorical and not Ordinal

d] gross_income -- Numerical and Continuous

e] smoke -- Categorical and Not ordinal

f] amtWeekends -- Numerical and Descrete

g] amtWeekdays -- Numerical and Descrete