Session 3, Part D:
Ordering Hats

In This Part: Understanding the Question | Data Analysis Using a Stem and Leaf Plot
Using a Histogram to Analyze the Hat-Size Data | Summary

Let's plan an order for 1,000 Standard Fit hats.

How large are people's heads? Are some head sizes more common than others? For an order of 1,000 unisex Standard Fit hats, how many of each size should you order?

We used a metric tape measure to measure the head circumferences of 55 people to the nearest millimeter:

 615 542 550 580 590 540 566 608 555 556 580 580 562 564 578 580 600 565 555 568 590 548 577 579 555 569 603 560 550 587 556 584 590 603 554 560 569 532 570 600 590 557 607 560 559 570 534 520 560 554 610 600 600 570 560

Problem D3

Create a stem and leaf plot for these data, using stems that correspond to Standard Fit hat sizes. Keep in mind that these are three-digit numbers and that, for these data, the stems will be based on the left two digits of the values.

 Problem D4 Based on the stem and leaf plot, what are some things you can say about the way head sizes are distributed? Give two descriptive statements to answer the question "How large are people's heads?"

 Problem D5 Based on the stem and leaf plot, do some head sizes appear to be more common than others? Which head sizes are most common? Least common?

 Problem D6 What would happen if you ordered an equal number of each size of Standard Fit hats?

 Session 3: Index | Notes | Solutions | Video