Question

1. Joint frequency distributions are used to display:

Select one:

a. the cumulative distribution of a variable with two possible outcomes.

b. the histograms of two variables analyzed simultaneously.

c. the relative frequency of two variables.

d. the number of occurrences at each of the possible joint occurrences of two variables.

2.For which data collection method is it most important to have a polished-looking survey form?

Select one:

a. Telephone survey

b. Experimental design

c. Written questionnaire

d. Personal interview

3. One characteristic of a bar chart is:

Select one:

a. it is used to display the distribution of a continuous variable.

b. it shows cumulative frequency.

c. the bars can be displayed either vertically or horizontally.

d. there can be no gaps between the bars.

4. The Fitness Center manager has collected data on the number of visits to the club each week for the past 8 weeks. These data are shown as follows. Which of the following statements is most correct?

Week 1	Week 2	Week 3	Week 4	Week 5	Week 6	Week 7	Week 8
1415	1623	1934	1879	2102	2156	2511	2499

Select one:

a. There has been a gradual downward trend in these data.

b. The data lend themselves to a line chart.

c. A frequency histogram should be developed to help identify the trend in these data.

d. The proper graph for displaying these data is a pie chart.

5. The human resources department at a major high tech company recently conducted an employee satisfaction survey of 100 of its 3000 employees. Data were collected on such variables as age, gender, marital status, current salary, level of overall satisfaction on a scale from 1 to 5, number of years with the company, and job title. Which of the variables listed are considered to be ratio level data?

Select one:

a. None of the variables is ratio level.

b. Age and years with the company

c. Gender and marital status

d. Job title

Answer 1

Answer to 1st question:
Option d is the most appropriate option, that is , the number of occurrences at each of the possible joint occurrences of two variables.

Also, Options a & b are also valid when it comes to joint frequency distrubution.

Answer to 2nd question:

Option a is correct

Answer to 3rd question:
One characteristic of a bar chart is the bars can be displayed either vertically or horizontally.

Hence, Option c is correct

Rest of the options are implied for a Histogram

Answer to 4th question:

Looking at the data, Option b is the appropriate option

that is, The data lend themselves to a line chart.

Answer to 5th question:

Age and Year is a ratio level data, as both these variables have a meaningful zero

Option b is correct