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There will be a Statistics seminar at UMIST on Wednesday 24th November. Details are given below. All those interested are welcome to attend. Wednesday 24th November, 2.00pm - 3.00pm Venue: UMIST, MSS/M12 Speaker: Dr Jingsong Yuan, UMIST. Title: Testing Linearity for Stationary Time Series Using the Sample Interquartile Range Abstract: We present theoretical results on the size and power of Hinich's linearity test and propose a modification. The modified test also uses the sample interquartile range, but it is based on normal distributions rather than the noncentral chi-squared. It can be interpreted as testing the equality of location parameters. The null distribution is known and the critical value particularly simple to calculate. The limitation of the sample interquartile range as a measure of deviation from the null hypothesis is discussed. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%