BIOL132 - L5 0.0 / 5 ? BiologyBIOL132UniversityNone Created by: KatherineCreated on: 07-06-16 20:20 What do we do in science? Formulate a decision between two or more hypotheses. 1 of 12 What is a null hypothesis? The mean hight of 2 year old jamaican boys in 86.5cm. 2 of 12 What is an alternative hypothesis? The mean height of 2 year old jamaican boys is not 86.5cm 3 of 12 What do we do to pro/disprove hyptoheses? Start by assuming H0. Find evidence againtt H0, If enough evidence, refute H0 and conclude HA. 4 of 12 How do we calculate the Cl? Mean +- 1.96 x SE 5 of 12 What is the SE? It is S/Square root of (n) 6 of 12 When is a p value a 2 tailed test? Ahen a sample statistic is compared agaisnt a null hypothesis 7 of 12 What is the p-value? It is the measure of strength of evidence against H0. 8 of 12 When is a p value a one tailed test? When we are restricted to a directional question. E.g. are Jamaican boys shorter than british boys. 9 of 12 What does a p value do? It gives the probability of observing a statistic at least as extreme as the one you have calculated asuming H0 is true. 10 of 12 The smaller the p value, the... greater the evidence against the null hypothesis 11 of 12 How should a p value be judged? In the context of the experiment, the statistic of interest, the hypotheses a significance level. 12 of 12
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