Common Core Math I Unit 1 Day 2 Frequency Tables and Histograms.

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Presentation transcript:

Common Core Math I Unit 1 Day 2 Frequency Tables and Histograms

Warm Up: Frequency Tables and Histograms A group of teens were asked how many apps they downloaded to their cell phones last month. The results are shown in the table below. 1.How many teens were surveyed? 2.How many total apps were downloaded by this group of teens? 3. Give one number that you think best represents the typical number of apps that a teen downloads in one month. Justify your answer. # of apps Downloaded Frequency

HW: 1 Determine whether the following data is categorical (C) or quantitative (Q) a. The candidate a survey respondent will support in an upcoming election. C b. The length of time of people’s drive to work. Q c. The number of televisions in a household. Q d. The distance kickers for a football team can kick a football. Q e. The number of pages copied in the copy room each day. Q f. The kind of tree in each person’s front yard in a neighborhood. C g. The type of blood a person has. C h. The jersey numbers of the football team. C i. The heights of the tallest buildings in the world. Q j. The language spoken by 2000 people coming in to JFK Airport. C

2. A math student is interested in figuring out the average price of vehicles at KnightdaleHigh School. She takes a sample of 50 cars in the school’s parking lot and finds the average value to be $13, 400. a. What is the population? all cars in knightdale High School’s parking lot b. What are the individuals? individual cars c. What data is being collected? (Include units if applicable) the value of each car in dollars d. What type of data is it (categorical or quantitative)? How do you know? quantitative

Link Up Frequency Distribution Table Histogram (by hand) Number of Paper Clips Frequency

Describing Distributions Shape Outliers Center Spread

Shape Mound shaped & symmetrical Skewed left (extreme low values) Skewed right (extreme high values) Uniform

Center When describing a distribution at first, the center can be “eyeballed.” Remember, you are trying to answer the question: “What is the most typical value?”

Spread Range Remember, you are trying to answer the question: “ How much do values typically vary from the center?” BE SURE TO STATE EVERYTHING IN CONTEXT!!

Describing Data SHAPE: Our data of ___________________ is shaped like ___________. OUTLIERS: Some students can work really ______ and put together _____ paper clips. CENTER: Students can typically hook together ____ number of paperclips in _____ time. SPREAD: Students were able to put together from ____ to _____ number of paper clips in ____ time.

NFL Rushing Statistics Group activity: Make a frequency distribution table for your assigned column of data. Draw the corresponding histogram on graph paper. Write a paragraph about your data that addresses S.O.C.S.

Homework Complete HW 1.2