Please begin filling out the student interest survey while you wait

WELCOME!!!Algebra II

Ms. DeVeny

On your Post-it…• Write down the

average number of texts you send per day

• Compared to your peers do you believe you text more or less than they do?– Justify your

reasoning

Order Yourselves

• Collect the data on texting for students in this class

Order Yourselves

• Collect the data on texting for students in this class

• Collect the data on texting for students in this class BY GENDER

Using the Histograms below list everything you “know” about students who text during class

With your partner:Find TWO things you both think the histograms “say” and justify why you

think they say that.

Algebra II

• 53% of young people surveyed said that they would rather give up their sense of smell than their technology

• 80% of jobs that will exist in the future do not exist now!– The world is rapidly changing and thus so must

education– Common Core

Histogram of Our Class Data

• Whole Class

Histogram of Our Class Data

• Male Vs. Female

Exit Slip:How does our class data on texting

compare to this study’s data on texting?

I. Is a Statistic just a number?A) Example of a statistic:• 99% of males and 98% of females under the age of 18

report playing videogames regularly

• 90% of 4th to 8th graders report being victims of bullying

• 77% of young adults are very/somewhat confident that they can text and drive safely

• 53% of young people surveyed said that they would rather give up their sense of smell than their technology

B) Definitions:① Statistics is the science/process of collecting,

organizing, summarizing, and analyzing information in order to draw conclusions

C) Steps of a Statistical Study:1. Determine the research objective. AKA: the

question(s) to be answered2. Collect the needed information from the population

a. Population-ALL individuals in a groupb. Sample-Only a portion of the individuals in the

population

3. Organize and summarize the information using descriptive statisticsa. Descriptive statistics provides an overview of the

information collected through the use of numerical measures, charts, graphs, and/or tables.

4. Draw conclusions from the information collecteda. When the information collected from the sample is then

generalized to the population this is called inferential statistics

D) Example:1. On average teenage girls text three times as much as

teenage boys do

D) Example:2. Histogram

Your Turn• 99% of males and 98% of females under the age of 18

report playing videogames regularly

• 90% of 4th to 8th graders report being victims of bullying

• 77% of young adults are very/somewhat confident that they can text and drive safely

• 53% of young people surveyed said that they would rather give up their sense of smell than their technology

II. What Does a Histogram Say?

A) Definition:① A histogram is a tool (chart/graph) used to display

either frequency or relative frequency ② The frequency of an event is the number of times

that event occurred③ The relative frequency is the proportion (or percent)

of observations within an event compared to the other observations

B) Example:1. USE CLASS DATA from survey for this male

B) Example:1. USE CLASS DATA from survey for this female

Your TurnThe manager of Wendy’s is trying to decide if she should hire another employee to work the lunch hour. She feels that her current employees shouldn’t need another employee but her employees are complaining that they are too busy and need more help to keep customers happy. She decides to track the number of customers who come into Wendy’s, at the lunch hour, during 15 minute intervals (see chart to the right). Create a mathematical argument to defend whether or not she should hire another employee.

Number of Customers at Wendy’s

7 6 65 6 62 7 16 5 52 2 96 2 66 8 24 6 96 4 114 2 43 7 75 5 76 5 85