Perplex
Content
  • Exponents & Logarithms
  • Approximations & Error
  • Sequences & Series
  • Matrices
  • Complex Numbers
  • Financial Mathematics
  • Cartesian plane & lines
  • Function Theory
  • Modelling
  • Transformations & asymptotes
  • 2D & 3D Geometry
  • Voronoi Diagrams
  • Trig equations & identities
  • Vectors
  • Graph Theory
  • Probability
  • Descriptive Statistics
  • Bivariate Statistics
  • Distributions & Random Variables
  • Inference & Hypotheses
  • Differentiation
  • Integration
  • Differential Equations
Other
  • Review Videos
  • Formula Booklet
  • Blog
  • Landing Page
  • Sign Up
  • Login
  • Perplex
    IB Math AIHL
    /
    Inference & Hypotheses
    /

    Problem Bank

    [Maximum mark: 7]

    A tech company would like to demonstrate that companies that use their product have higher revenues than those that do not.

    Company

    Orange

    Trillion

    Blaze Wolf

    Jungle

    Annual revenue (In billions of dollars) before using product

    500

    700

    300

    900

    Company

    Orange

    Trillion

    Blaze Wolf

    Jungle

    Annual revenue (In billions of dollars) after using product

    900

    600

    700

    1000

    The company performs a paired-t test with a ​5%​ level of significance.

    1. State the null and alternative hypotheses.

      [1]

      To earn a crown, get your answer ready before you reveal the options!

    2. State the conclusion of the t-test.

      [6]

    Ask Plex AI about this problem

    Get hints, ask questions, and work through this problem step by step

    I'm Plex, here to help with problems on this worksheet!