# Question

Ronald Fisher, an English statistician (1890–1962), collected measurements for a sample of 150 irises. Of concern were five variables: species, petal width (PW), petal length (PL), sepal width (SW), and sepal length (SL) (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 random sample of his complete dataset is given in the accompanying table.

a. Construct a scatter diagram of petal length, x, and petal width, y. Use different symbols to represent the three species.*

b. Construct a scatter diagram of sepal length, x, and sepal width, y. Use different symbols to represent the three species.

c. Explain what the scatter diagrams in parts a and b portray. Let’s see how well a random sample represents the data from which it was selected.

d. Repeat parts a and b using the dataset containing all 150 of Fisher's data on [EX03-025].

e. Aside from the fact that the scatter diagrams in parts a and b have fewer data, comment on the similarities and differences between the distributions shown for 150 data and for the 30 randomly selected data.

a. Construct a scatter diagram of petal length, x, and petal width, y. Use different symbols to represent the three species.*

b. Construct a scatter diagram of sepal length, x, and sepal width, y. Use different symbols to represent the three species.

c. Explain what the scatter diagrams in parts a and b portray. Let’s see how well a random sample represents the data from which it was selected.

d. Repeat parts a and b using the dataset containing all 150 of Fisher's data on [EX03-025].

e. Aside from the fact that the scatter diagrams in parts a and b have fewer data, comment on the similarities and differences between the distributions shown for 150 data and for the 30 randomly selected data.

## Answer to relevant Questions

Total solar eclipses actually take place nearly as often as total lunar eclipses, but the former are visible over a much narrower path. Both the path width and the duration vary substantially from one eclipse to the next. ...A random sample of 10 seventh-grade students gave the following data on of minutes watching television on an average weeknight versus of minutes spent on homework on an average weeknight. a. Construct a scatter diagram with ...Movie production companies spend millions of dollars to produce movies, with the great hope of attracting millions of people to the theater.The success of a movie can be measured in many ways, two of which are box office ...“The perfect age” graphic shows the results from a 9 × 2 contingency table for one qualitative and one quantitative variable. a. Identify the population and name the qualitative and quantitative variables. b. Construct ...If all students from Mr. Chamberlain’s physical fitness course on page 127 who can do 40 push-ups are asked to do as many sit-ups as possible: a. How many sit-ups do you expect that each can do? b Will they all be able to ...Post your question

0