Ms. Rigano's Math Classes



Ch 1.1 Practice HW Name:

EX 1: Which graph would be a better choice for the following data (pie char or bar graph)? Create that graph and explain why you chose it over the other option.

|Age Group (years) |Percent owning an MP3 player |

|12 – 17 |54 |

|18 – 24 |30 |

|25 – 34 |30 |

|35 – 54 |13 |

|55 and older |2 |

The table to the right represents the percents

of people in various age groups who own a portable MP3 player, according to survey of 1112 randomly selected people.

-----------------------------------------------------------------------------------------------------------

Ch 1.1 Practice HW Name:

EX 1: Which graph would be a better choice for the following data (pie char or bar graph)? Create that graph and explain why you chose it over the other option.

|Age Group (years) |Percent owning an MP3 player |

|12 – 17 |54 |

|18 – 24 |30 |

|25 – 34 |30 |

|35 – 54 |13 |

|55 and older |2 |

The table to the right represents the percents

of people in various age groups who own a portable MP3 player, according to survey of 1112 randomly selected people.

EX 2: In 1912, the ship the Titanic struck an iceberg and sank. The 1997 movie implied the following... A) First class passengers received special treatment boarding the lifeboats (while

others were prevented from reaching them).

B) Women and children boarded the lifeboats first, and then the men were allowed on.

| | | | | |Gender |

| |Survival Status | | |Female |Male |

|Class of Travel |Survived |Died | |Class of Travel |Survived |

| |Survival Status | | |Female |Male |

Class of Travel |Survived |Died | |Class of Travel |Survived |Died |Survived |Died | |First Class |197 |122 | |First Class |140 |4 |57 |118 | |Second Class |94 |167 | |Second Class |80 |13 |14 |154 | |Third Class |151 |476 | |Third Class |76 |89 |75 |387 | |

1. Does these tables give us frequency or relative frequency? How do you know?

2. What is the marginal distribution of survival on the Titanic?

3. What is the conditional distribution of being a third class passenger and surviving?

4. How does gender affect the relationship between class of travel and survival status? Explain.

5. What do the graphs tell us about the two suggestions (A and B)? Use graphical and numerical evidence to support your answer.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download