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  1. Answers: You can download example answers for all the questions in this Statistics & Mathematics Workbook from your my tutor2u account. We would advise that you attempt to answer each question before looking at the model answers!

  2. STATISTICAL KNOWEDGE QUESTIONS. These questions ask you to judge which statistical test is appropriate in which situations. They don’t ask you to carry out the test. Here’s one from the SAMs (Standardised Assessment Materials) on the Edexcel website.

  3. sample space † probabilityodds A possible result of an experiment is an outcome. For instance, when you roll a number cube there are 6 possible outcomes: a 1, 2, 3, 4, 5, or 6. An event is an outcome or a collection of outcomes, such as rolling an odd number. The set of all possible outcomes is called a sample space.

  4. Sep 2, 2019 · Previous: Direct and Inverse Proportion Practice Questions. Next: Reverse Percentages Practice Questions. The Corbettmaths Practice Questions on Probability.

  5. We can first compute the prior odds – that is, the odds before we knew that the person had tested positively. An odds ratio is an example of what we will later call an effect size, which is a way of quantifying how relatively large any particular statistical effect is.

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  6. Question 7: Beatrice has a biased four sided spinner. The table shows the probabilities that the spinner will land on a 2 or 3. The probability that the spinner will land on 1 is three times the probability that the spinner will land on 4. Work out the probability that the spinner will land on 1.

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  8. Probability refers to the likelihood of an event occurring. It can be expressed as a number (0.5) or a percentage (50%). Statistical tests allow psychologists to work out the probability that their results could have occurred by chance, and in general psychologists use a probability level of 0.05.