Math test??

• • finding a percentage of a quantity: (quantity) x (total) / (total) x
• • To write a percentage as an amount: write the numerator in the numerator of a fraction, write the whole amount as a denominator, and multiply by 100.
• • decreasing as a percentage: multiply the percentage as a whole amount
• • Unitary method: Find 1% of the quantity, then multiply by 100.
• Cost price= how much they buy the item for
• selling price: how much they sell the item for
• GST: It is a TAX paid to the government on

  most goods are services that we purchase.

  It is charged at 10 % of the original price

  & included in the purchase price /final price)
• Types of graphs:

  divided bar graphs,

  sector graphs,

  line graphs,

  stem-and-leaf plots

  dot plots.
• Types of data:

  • Categorical: Words or symbols
  • Quantitive: Numbers or units
• Types of categorical data:

  • Nominal: categories that cannot be ordered, (colors, types of travel etc.)
  • Ordinal: categories that can be ordered, (fan settings: low, medium, high, Ranks: a, b, c)
• Types of quantitive:

  • discrete: Things that can be counted
  • Continuous: data that can only be measured
• Mean: The average
• Median: The middle number
• Mode: The most common number
• Range: The difference between the highest and lowest values in a data set.
• Frequency Histogram: A graph representing the information on a frequency table.

  
• Polygon: The line on top of the frequency histogram

  
• Ways to collect data are: surveys, interviews, questionnaires, observations, experiments, and focus groups
• A census is: A survey of the whole population, not just a group.