Bluman A.G. Elementary Statistics- A Step By Step Approach

Section 2–2 Histograms, Frequency Polygons, and Ogives 63Extending the Concepts19. Using the histogram shown here, do the following.Frequency76543210y21.5 24.5 27.5 30.5 33.5 36.5 39.5 42.5Class boundariesxa. Construct a frequency distribution; include classlimits, class frequencies, midpoints, and cumulativefrequencies.b. Construct a frequency polygon.c. Construct an ogive.20. Using the results from Exercise 19, answer thesequestions.a. How many values are in the class 27.5–30.5? 0b. How many values fall between 24.5 and 36.5? 14c. How many values are below 33.5? 10d. How many values are above 30.5? 16Technology Step by StepMINITABStep by StepConstruct a Histogram1. Enter the data from Example 2–2, the high temperatures for the 50 states.2. Select Graph>Histogram.3. Select [Simple], then click [OK].4. Click C1 TEMPERATURES in the Graph variables dialog box.5. Click [Labels]. There are two tabs, Title/Footnote and Data Labels.a) Click in the box for Title, and type in Your Name and Course Section.b) Click [OK]. The Histogram dialog box is still open.6. Click [OK]. A new graph windowcontaining the histogram will open.7. Click the File menu to printor save the graph.2–29