Biff samples 943 wombats in the provincial park, and finds 40% of them are rabid. If you take a sample from the same park and find that only 37% of them are rabid, would that prove Biff's statistic is wrong?
Added by Larry B.
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- Biff's sample: 943 wombats, 40% of which are rabid. - Your sample: Unknown number of wombats, 37% of which are rabid. Show more…
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A study of fox rabies in southern Germany gave the following information about different regions and the occurrence of rabies in each region (Reference: B. Sayers et al., "A Pattern Analysis Study of a Wildlife Rabies Epizootic," Medical Informatics, Vol. 2, pp. 11-34). The data gives the number of cases of fox rabies found in 16 locations of region I and 15 locations of region II. Region I Data 1 7 7 7 6 7 7 1 3 3 3 1 4 1 4 5 Region II Data 1 1 3 2 4 8 5 5 4 4 3 3 5 6 9 Let u1,u2 represent the mean number of cases of fox rabies in region I and in region II respectively. At significance level 0.02, does this information indicate that there is a difference (either way) in the mean number of cases of fox rabies between the two regions? Assume the distribution of rabies cases in both regions is mound-shaped and approximately normal. dbar=-0.01 SEc=0.8441 two-tail test t* value=-0.012 D.F.=29 p-value=? Based on the given samples, construct a 88.49 % confidence interval to estimate the difference in the mean number of cases of fox rabies between the two regions tc=? C.I.=?
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A study of fox rabies in southern Germany gave the following information about different regions and the occurrence of rabies in each region (Reference: B. Sayers et al., "A Pattern Analysis Study of a Wildlife Rabies Epizootic," Medical Informatics, Vol. 2, pp. 11-34). The data gives the number of cases of fox rabies found in 16 locations of region I and 15 locations of region II. Region I Data 1 7 7 7 6 7 7 1 3 3 3 1 4 1 4 5 Region II Data 1 1 3 2 4 8 5 5 4 4 3 3 5 6 9 Let u1,u2 represent the mean number of cases of fox rabies in region I and in region II respectively. At significance level 0.02, does this information indicate that there is a difference (either way) in the mean number of cases of fox rabies between the two regions? Assume the distribution of rabies cases in both regions is mound-shaped and approximately normal. dbar=-0.01 SEc=0.8441 two-tail test t* value=-0.012 D.F.=29 p-value=0.9905 Based on the given samples, construct a 88.49 % confidence interval to estimate the difference in the mean number of cases of fox rabies between the two regions tc=? Round tc to 3 decimals
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Amphibian populations are in decline worldwide due to the increasing prevalence of ranavirus infections. Herpetologists (those that study amphibians and reptiles) are especially concerned with how ranavirus infections may be affecting Ozark and eastern hellbender populations. Suppose both populations of hellbenders are known to have ranavirus infections at a rate of 25%. Suppose a random sample of size 194 is taken of the eastern hellbender population and a random sample of size 291 is taken of the Ozark hellbender population. Every hellbender in each sample is tested for ranavirus, and the sample proportions for each of the two samples are calculated. Which of the two sample proportions is more likely to exceed 22%? Select one: a. They are equally likely to exceed 22%. b. The sample proportion of ranavirus infections for the eastern hellbenders. c. There is not enough information present to answer this question. d. The sample proportion of ranavirus infections for the Ozark hellbenders.
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