## A Level Maths for OCR S1Written to match to the OCR(A) A Level specification, this text provides individual, board-specific textbooks for each module. Accessible for all levels of student, the series provides pre-AS material in module books to support weaker candidates. |

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### Contents

Measures of Spread | 26 |

Working with Mean and Standard Deviation | 52 |

Counting Methods and Probability | 66 |

Laws of Probability | 80 |

Further Counting Methods 138 | 102 |

Discrete Random Variables | 112 |

The Binomial Distribution 183 | 123 |

The Geometric Distribution | 140 |

Correlation and Regression | 149 |

Rank Correlation | 192 |

Revision Exercises | 207 |

### Common terms and phrases

answer balls binomial distribution biros box plot Calculate the mean Calculate the probability Calculate the product cards cars chapter chosen colour cumulative frequency graph data points data values days absence denote the number discrete random variable exactly EXAMPLE fair cubical Find the mean Find the probability formula frequency table geometric distribution girls given illustrate the data interquartile range leaf diagram least line of negative line of positive linear lower quartile mass Maximum life span mean and standard midmarks mins negative gradient Northton observations obtained OCRJun order of choice P(card positive gradient probability distribution product moment correlation pupils quartile random variable rank correlation coefficient regression line Revision Exercise sample space scatter diagram set of data sigma notation Southville spades Spearman's rank correlation standard deviation stem and leaf summarised table below shows tiles total number upper quartile variance and standard wins