Question 1

Use critical thinking to address the key issue.
-An employee at the local ice cream parlor asks three customers if they like chocolate ice cream.

Accepted Answer

The answer of Use critical thinking to address the key...

Question 2

Use critical thinking to address the key issue.
-A researcher published this survey result: "74% of people would be willing to spend 10 percent more for energy from a non-polluting source". The survey question was announced on a national radio show and 1,200 listeners responded by calling in. What is wrong with this survey?

Accepted Answer

The answer of Use critical thinking to address the key...

Question 3

Use critical thinking to address the key issue.
-You plan to make a survey of 200 people. The plan is to talk to every 10th person coming out of the school library. Is there a problem with your plan?

Accepted Answer

The answer of Use critical thinking to address the key...

Question 4

Determine which of the four levels of measurement  is most appropriate.
-Ages of survey respondents.

Accepted Answer

Ages of survey respondents are measured on a ratio scale because they have a true zero point (age 0) and the differences between values are meaningful.

Question 5

Use critical thinking to address the key issue.
-A questionnaire is sent to 10,000 persons. 5,000 responded to the questionnaire. 3,000 of the respondents say that they "love chocolate ice cream". We conclude that 60% of people love chocolate ice cream. What is wrong with this survey?

Accepted Answer

The answer of Use critical thinking to address the key...

Question 6

Determine which of the four levels of measurement  is most appropriate.
-Student's grades, A, B, or C, on a test.

Accepted Answer

Student's grades (A, B, or C) on a test are an example of ordinal measurement because the grades represent ordered categories with a meaningful sequence (A is higher than B, and B is higher than C), but the differences between the grades are not necessarily consistent or measurable in a meaningful way.

Question 7

Use critical thinking to address the key issue.
-In a poll of 50,000 randomly selected college students, 74% answered "yes" when asked "Do you have a television in your dorm room?".

Accepted Answer

The answer of Use critical thinking to address the key...

Question 8

Determine which of the four levels of measurement  is most appropriate.
-Salaries of college professors.

Accepted Answer

Salaries of college professors are best described by the ratio level of measurement because they have a true zero point (meaning no salary or absence of money) and the differences between values are meaningful. Additionally, ratios of salaries (e.g., one salary being twice another) are meaningful, which is a characteristic of the ratio level of measurement.

Question 9

Determine which of the four levels of measurement  is most appropriate.
-The temperatures of eight different plastic spheres.

Accepted Answer

The temperatures of eight different plastic spheres are best described using the interval level of measurement because temperatures can be ordered and the differences between them are meaningful. However, there is no true zero point (where zero does not mean the absence of temperature, as in the case of Celsius or Fahrenheit scales), distinguishing it from the ratio level.

Question 10

Determine which of the four levels of measurement  is most appropriate.
-The subjects in which college students major.

Accepted Answer

The subjects in which college students major are categorized without a natural order or ranking, fitting the definition of nominal level of measurement.

Question 11

Determine which of the four levels of measurement  is most appropriate.
-Nationalities of survey respondents.

Accepted Answer

Nationalities of survey respondents are categorized without a natural order or ranking, fitting the definition of nominal level of measurement, which is used for labeling or categorizing data without any quantitative value.

Question 12

Determine which of the four levels of measurement  is most appropriate.
-The sample of spheres categorized from softest to hardest.

Accepted Answer

The categorization from softest to hardest indicates a ranking order, which aligns with the ordinal level of measurement. This level allows for the ordering of items based on some attribute or characteristic.

Question 13

Use critical thinking to address the key issue.
-100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and only 45% said yes.

Accepted Answer

The answer of Use critical thinking to address the key...

Question 14

Use critical thinking to address the key issue.
-An airline company advertises that 100% of their flights are on time after checking 5 randomly selected flights and finding that these 5 were on time.

Accepted Answer

The answer of Use critical thinking to address the key...

Question 15

Use critical thinking to address the key issue.
-In a study of headache patients, every one of the study subjects with a headache was found to be improved after taking a week off of work. Conclusion: Taking time off work cures headaches.

Accepted Answer

The answer of Use critical thinking to address the key...

Question 16

Determine which of the four levels of measurement  is most appropriate.
-Temperatures of the ocean at various depths.

Accepted Answer

Ocean temperatures at various depths are measured on a scale that allows for meaningful differences between measurements, but there is no true zero point (since temperatures can go below zero), making the interval level of measurement most appropriate. This level allows for the comparison of the differences between values.

Question 17

Use critical thinking to address the key issue.
-"7 out of 10 dentists recommend Brand X toothpaste". This finding is based on the results of a survey of 10 randomly selected dentists. What is wrong with this survey?

Accepted Answer

The answer of Use critical thinking to address the key...

Question 18

Determine which of the four levels of measurement  is most appropriate.
-Survey responses of "good, better, best".

Accepted Answer

The survey responses "good, better, best" indicate a ranking order without specifying the exact differences between the categories, which is characteristic of ordinal measurement.

Question 19

Use critical thinking to address the key issue.
-A study shows that adults who work at their desk all day weigh more than those who do not. Conclusion: Desk jobs cause people to gain weight.

Accepted Answer

The answer of Use critical thinking to address the key...

Question 20

Determine which of the four levels of measurement  is most appropriate.
-Amount of fat (in grams)in cookies.

Accepted Answer

The amount of fat in grams in cookies is a ratio level of measurement because it has a meaningful zero point (0 grams indicates no fat), and the differences between values are meaningful, allowing for a full range of mathematical operations (addition, subtraction, multiplication, division).

Quiz 1: Introduction to Statistics

Use critical thinking to address the key issue. -An employee at the local ice cream parlor asks three customers if they like chocolate ice cream.

Use critical thinking to address the key issue. -You plan to make a survey of 200 people. The plan is to talk to every 10th person coming out of the school library. Is there a problem with your plan?

Determine which of the four levels of measurement is most appropriate. -Ages of survey respondents.

Use critical thinking to address the key issue. -A questionnaire is sent to 10,000 persons. 5,000 responded to the questionnaire. 3,000 of the respondents say that they "love chocolate ice cream". We conclude that 60% of people love chocolate ice cream. What is wrong with this survey?

Determine which of the four levels of measurement is most appropriate. -Student's grades, A, B, or C, on a test.

Use critical thinking to address the key issue. -In a poll of 50,000 randomly selected college students, 74% answered "yes" when asked "Do you have a television in your dorm room?".

Determine which of the four levels of measurement is most appropriate. -Salaries of college professors.

Determine which of the four levels of measurement is most appropriate. -The temperatures of eight different plastic spheres.

Determine which of the four levels of measurement is most appropriate. -The subjects in which college students major.

Determine which of the four levels of measurement is most appropriate. -Nationalities of survey respondents.

Determine which of the four levels of measurement is most appropriate. -The sample of spheres categorized from softest to hardest.

Use critical thinking to address the key issue. -100,000 randomly selected adults were asked whether they drink at least 48 oz of water each day and only 45% said yes.

Use critical thinking to address the key issue. -An airline company advertises that 100% of their flights are on time after checking 5 randomly selected flights and finding that these 5 were on time.

Use critical thinking to address the key issue. -In a study of headache patients, every one of the study subjects with a headache was found to be improved after taking a week off of work. Conclusion: Taking time off work cures headaches.

Determine which of the four levels of measurement is most appropriate. -Temperatures of the ocean at various depths.

Use critical thinking to address the key issue. -"7 out of 10 dentists recommend Brand X toothpaste". This finding is based on the results of a survey of 10 randomly selected dentists. What is wrong with this survey?

Determine which of the four levels of measurement is most appropriate. -Survey responses of "good, better, best".

Use critical thinking to address the key issue. -A study shows that adults who work at their desk all day weigh more than those who do not. Conclusion: Desk jobs cause people to gain weight.

Determine which of the four levels of measurement is most appropriate. -Amount of fat (in grams) in cookies.