Write the null and alternative hypotheses in words and using mathematical symbol
ID: 3340991 • Letter: W
Question
Write the null and alternative hypotheses in words and using mathematical symbols for each of the following situations
Write the null and alternative hypotheses in words and using mathematical symbols for each of the following situations. 1. Minnesota residents are known to be taller than average US residents. In a local sur vey, a random sample of 33 Minnesota residents were measured. Do these data provide convincing evidence that the Minnesota resident average height is larger than the national 169.6cm average height? 2. In 2005 on an island (New Caledonian archipelago), all the rats of the were eradicated. To study rat's influence on the biodiversity of birds, two surveys were led: one in 2004., and one in 2009. Each study consists of the observation of biodiversity indicators (mea sured between 0 and 1) in 47 parcels, leading to 2.2004 = 0.21 and 2.2009 = 0.20. Do these data provide convincing evidence that rat has an influence on biodiversity of birds? 3. The so-called Mediterranean diet is pretty popular as a way to prevent heart diseases, since it supposedly reduces the cholesterol level. The cholesterol level of 74 randomly picked persons having Mediterranean diet is measured and compared to the average US level. Do these data provide convincing evidence that Mediterranean diet reduces cholesterol level?Explanation / Answer
(1)
Ho: Minnesota resident average height is not greater than 169.6 cm ( 169.6)
Ha: Minnesota resident average height is greater than 169.6 cm ( > 169.6)
(2)
Ho: Rats have no influence on biodiversity of birds ( 1 = 2)
Ha: Rats have an influence on the biodiversity of birds (1 2)
(3)
Ho: Meditteranean diet does not reduce cholesterol level (1 2)
Ha: Meditteranean diet reduces cholesterol level (1 < 2)
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