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5 Number of men Number of tunnels Time in years 100 000 4 4 100 000 2 2 20 000 8 40 400 000 2 0.5 6 Number of mosquitoes Number of young Time 1 18 000 1 hour 1 5 1 second 500 9 million 1 hour 500 4.5 billion 500 hours 7 a 5 b 1000 c 2.26 × 108 tonnes 8 a 910 kg (2 s.f.) b 4600 tonnes (2 s.f.) c 180 000 tonnes (2 s.f.) 9 a 16 tonnes (2 s.f.)
1.1 Definitions of Statistics, Probability, and Key Terms. Frequency, Frequency Tables, and Levels of Measurement. 2.1 Stem-and-Leaf Graphs (Stemplots), Line Graphs, and Bar Graphs. 2.2 Histograms, Frequency Polygons, and Time Series Graphs. 4.1 Probability Distribution Function (PDF) for a Discrete Random Variable.
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The goal of statistics is not to perform numerous calculations using the formulas, but to gain an understanding of your data. The calculations can be done using a calculator or a computer. The understanding must come from you.
Solving predictions and probability problems. Distinguishing between dependent and independent events. Interpreting charts and histograms. Our resources can be used online and offline, on virtually any computer or mobile device. Browse around our website and start playing! Find Math games to practice every skill.
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Introduction to Logarithms. In its simplest form, a logarithm answers the question: How many of one number multiply together to make another number? Example: How many 2 s multiply together to make 8? Answer: 2 × 2 × 2 = 8, so we had to multiply 3 of the 2 s to get 8. So the logarithm is 3. How to Write it. We write it like this: log2(8) = 3.
