Author:
Hannah Hynes-Petty
Subject:
Mathematics
Material Type:
Assessment, Homework/Assignment
Level:
High School
Tags:
  • Washington Office of Superintendent of Public Instruction
  • wa-math
    License:
    Creative Commons Attribution
    Language:
    English
    Media Formats:
    Downloadable docs

    Education Standards

    OSPI Statistics and Geometry Instructional Task: Flower Shop

    OSPI Statistics and Geometry Instructional Task: Flower Shop

    Overview

    This resource was created by the Washington Office of Superintendent of Public Instruction. 

    Task

    OSPI Statistics and Geometry Instructional Task 3A.5

    Statistics and Geometry; Standard S-ID.1, Claim 4

    Flower Shop

    Julie is the owner of Julie’s Flower Shop. She wants to close the store two days a week, but can’t decide which two days are the best times to close. She creates a box plot representing the number of flowers sold each day for 30 days.

     

    • Explain specifically all information that Julie’s box plot provides in this context.
    • Determine whether the box plot gives Julie enough information to make a reasonable decision on which two days of the week she should close the shop. Explain your answer in regards to this type of graph. 

    Rubric

    Rubric

    Question Number

    Standard/Claim

    Description

    3A.5

    S-ID.1/Claim 4

    A 2-point response demonstrates understanding of the Standard & Claim by doing the all of the following:

    • See Exemplar

    Julie needs to have data for sales over time on the individual days of the week to be able to compare potential profit or loss impact by closing a specific day.

    A 1-point response demonstrates limited understanding of the Standard and/or Claim by doing one of the following:

    • See Exemplar

    Julie needs to have data for sales over time on the individual days of the week to be able to compare potential profit or loss impact by closing a specific day.

    A 0-point response demonstrates almost no understanding of the Performance Expectation.

     

     

    OSPI Statistics and Geometry Instructional Task Exemplar

    OSPI Instructional Task 3A.5 Exemplar

    Statistics and Geometry; Standard S-ID.1, Claim 4

    Flower Shop

    Julie is the owner of Julie’s Flower Shop. She wants to close the store two days a week, but can’t decide which two days are the best times to close. She creates a box plot representing the number of flowers sold each day for 30 days.

     

    • Explain specifically all information that Julie’s box plot provides in this context.
    • Determine whether the box plot gives Julie enough information to make a reasonable decision on which two days of the week she should close the shop. Explain your answer in regards to this type of graph.

    The box plot supplies the following information in regards to Julie’s flower sales:

    Outliers provided at high number of flowers sales in one day – approx. 760 – 770 and low number of flowers sales in one day – approx. 280 - 290

    Median number of sales in one day: 500 flowers sold in one day

    Range of flower sales- approx. 480 flowers per day

    First Quartile 25% of data lies between 280 and about 440

    Second Quartile 25% of data lies between 440 and 500

    Third Quartile 25% of data lies between 500 and 570

    Fourth Quartile 25% of data lies between 570 and 770

    The graphed information is not enough for Julie to make a decision on what two days to close her store.  The information given is for a period of 30 days with no specific information on how sales went on each day of the week. (Mondays, Tuesdays, Wednesdays, etc.)  Julie needs to have a data display for sales for each day of the week not sales for 30 days shown by quartile.