Unit 1 Review Worksheet Name __________________________ Instructions: Print this worksheet and work each problem, showing work if possible. Submit the completed worksheet as a .PDF, .DOC or .JPG file to the Dropbox. Once your submission is made, you will receive a recording link. In that recording I go through each problem on the review so you can check your work and see what you missed before you take the test. When you are comfortable with the material and understand what you missed on the review, you may take the Unit 1 Test. 1. Describe each variable as either categorical or quantitative. If the variable is categorical, describe it as either nominal or ordinal. It the variable is quantitative, describe it as either discrete or continuous. a. Income b. Blood type 2. The U.S. Census Bureau divides the states (including the District of Columbia) into four regions. The circle graph shows the percent of the U.S. population living in each region, according to the 200 Census count. a. What percent of the population lived in the West? b. According to the 2000 Census count, the total U.S. population is 281,421,906. Find the population of the Midwest region in 2000. 3. A worker at a fast food restaurant is filing an order that was called in ahead of time. The order calls for 20 burgers and 22 chicken sandwiches. Half of the burgers are on whole wheat buns, 4 are on white buns and the remaining burgers are on pretzel buns. Six chicken sandwiches are wheat buns, and the remaining sandwiches are split evenly between white and pretzel buns. Create a two-way table for the situation. 4. A group of 300 people were asked how much money they spend each month on rent. The results are shown in the relative frequency table. How many people spend at least $1,500? 5. The histogram shows the number of points dance teams earned at a recent competition. How many teams scored above 20 points? 6. Based on the stem and leaf plot, which data value occurs most often? 7. There are 3 ways to display numeric data: Line Graph (aka dot plot), histogram, Stem and leaf plot. When is it best to use each of these graphs? Match the graph type with the condition for use. Line Graph Large Range, display frequency not values Stem and Leaf plot Small range Histogram Mid-size ranges, show data values 8. Use the time plot below to answer the questions: During which month was the difference in home sales in the West and the Northeast the greatest? During which month was the difference the smallest? 9. Match each graph with the description of its shape. Skewed Right Uniform Symmetric Skewed Left