# Question: Ronald Fisher an English statistician 1890 1962 collected measurements for a

Ronald Fisher, an English statistician (1890–1962), collected measurements for a sample of 150 irises. Of concern were the following variables: species, petal width (PW), petal length, sepal width (SW), and sepal length (all in mm). (Sepals are the outermost leaves that encase the flower before it opens.) The goal of Fisher’s experiment was to produce a simple function that could be used to classify flowers correctly. A sample of his data follows.

a. Is there a significant difference in the mean petal width for the three species? Use a 0.05 level of significance.

b. Is there a significant difference in the mean sepal width for the three species? Use a 0.05 level of significance.

c. How could Fisher use these outcomes to help him classify irises into the correct species?

a. Is there a significant difference in the mean petal width for the three species? Use a 0.05 level of significance.

b. Is there a significant difference in the mean sepal width for the three species? Use a 0.05 level of significance.

c. How could Fisher use these outcomes to help him classify irises into the correct species?

## Answer to relevant Questions

Cicadas are flying, plant-eating insects. One particular species, the 13-year cicada (Magicicada), spends five juvenile stages in underground burrows. During the 13 years underground, the cicadas grow from approximately the ...For the following data, show that SS(factor) = k1(1 = )2 = k2(2 = )2 = k3(3 = )2 where12, 3 , , are the means for the three factor levels and is the overall mean. Knowing a horse’s weight (measured in pounds) is important information for a horse owner.The amount of feed and medicine dosages all depend on the horse’s weight. Most owners do not have the resources to have a scale ...The test–retest method is one way of establishing the reliability of a test. The test is administered, and then, at a later date, the same test is readministered to the same individuals. The correlation coefficient is ...Consider a set of paired bivariate data. a. Explain why ∑(x = x) = 0 and ∑(y = y) = 0 b. Describe the effect that lines x = and y = have on the graph of these points. c. Describe the relationship of the ordered pairs ...Post your question