Contingency Tables Quiz
The question sheet
Reveal any answer as you study-
When used to calculate probabilities, a two-way table is often called a:
- Frequency polygon
- Stemplot
- Histogram
- Contingency table
Reveal answer
Answer: Contingency table
Source evidence
PDF page 200: A two-way table provides a way of portraying data that can facilitate calculating probabilities. When used to calculate probabilities, a two-way table is often called a contingency table. The table helps in determining conditional probabilities quite easily. The table displays sample values in relation to two different variables that may be dependent or contingent on one another. We used two-way tables in Chapters 1 and 2 to calculate marginal and conditional distributions. These tables organize data in a way that supports the calculation of relative frequency and, therefore, experimental (empirical) probability. Later on, we will use contingency tables again, but in another manner.
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A contingency table displays sample values in relation to how many different variables?
- Four
- Two
- Three
- One
Reveal answer
Answer: Two
Source evidence
PDF page 200: A two-way table provides a way of portraying data that can facilitate calculating probabilities. When used to calculate probabilities, a two-way table is often called a contingency table. The table helps in determining conditional probabilities quite easily. The table displays sample values in relation to two different variables that may be dependent or contingent on one another. We used two-way tables in Chapters 1 and 2 to calculate marginal and conditional distributions. These tables organize data in a way that supports the calculation of relative frequency and, therefore, experimental (empirical) probability. Later on, we will use contingency tables again, but in another manner.
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According to the text, the two variables in a contingency table may be:
- Dependent or contingent on one another
- Always identical
- Always independent
- Always mutually exclusive
Reveal answer
Answer: Dependent or contingent on one another
Source evidence
PDF page 200: A two-way table provides a way of portraying data that can facilitate calculating probabilities. When used to calculate probabilities, a two-way table is often called a contingency table. The table helps in determining conditional probabilities quite easily. The table displays sample values in relation to two different variables that may be dependent or contingent on one another. We used two-way tables in Chapters 1 and 2 to calculate marginal and conditional distributions. These tables organize data in a way that supports the calculation of relative frequency and, therefore, experimental (empirical) probability. Later on, we will use contingency tables again, but in another manner.
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Contingency tables help most easily in determining which type of probabilities?
- Theoretical probabilities
- Conditional probabilities
- Uniform probabilities
- Binomial probabilities
Reveal answer
Answer: Conditional probabilities
Source evidence
PDF page 200: A two-way table provides a way of portraying data that can facilitate calculating probabilities. When used to calculate probabilities, a two-way table is often called a contingency table. The table helps in determining conditional probabilities quite easily. The table displays sample values in relation to two different variables that may be dependent or contingent on one another. We used two-way tables in Chapters 1 and 2 to calculate marginal and conditional distributions. These tables organize data in a way that supports the calculation of relative frequency and, therefore, experimental (empirical) probability. Later on, we will use contingency tables again, but in another manner.
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In the cell phone/speeding study, the total number of people in the sample is:
- 755
- 685
- 450
- 305
Reveal answer
Answer: 755
Source evidence
PDF page 201: The total number of people in the sample is 755. The row totals are 305 and 450. The column totals are 70 and 685.
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In the cell phone/speeding table, the row totals are:
- 25 and 280
- 70 and 685
- 305 and 450
- 45 and 405
Reveal answer
Answer: 305 and 450
Source evidence
PDF page 201: The total number of people in the sample is 755. The row totals are 305 and 450. The column totals are 70 and 685.
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How many people used a cell phone while driving and had a speeding violation?
- 405
- 45
- 25
- 280
Reveal answer
Answer: 25
Source evidence
PDF page 201: Uses a cell phone while driving 25 280 305
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How many people did not use a cell phone and had no speeding violation?
- 280
- 450
- 405
- 45
Reveal answer
Answer: 405
Source evidence
PDF page 201: Does not use a cell phone while 45 405 450 driving
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In the athletes table, how many people stretch and had an injury in the past year?
- 231
- 55
- 295
- 219
Reveal answer
Answer: 55
Source evidence
PDF page 202: Stretches 55 295 350
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In the athletes table, the total number who do not stretch is:
- 219
- 231
- 350
- 450
Reveal answer
Answer: 450
Source evidence
PDF page 202: Does not stretch 231 219 450
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In the hikers example, how many females were in the sample?
- 100
- 18
- 45
- 16
Reveal answer
Answer: 45
Source evidence
PDF page 202: a. There are 45 females in the sample; 18 prefer the coastline and 16 prefer hiking near lakes and streams. So, we know
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In the hikers example, how many females prefer hiking on mountain peaks?
- 45
- 16
- 18
- 11
Reveal answer
Answer: 11
Source evidence
PDF page 202: a. There are 45 females in the sample; 18 prefer the coastline and 16 prefer hiking near lakes and streams. So, we know
PDF page 202: there are 45 − 18 − 16 = 11 female students who prefer hiking on mountain peaks. Continue reasoning in this way to complete the table.
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