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# MATH399 Statistics—Lab Week 2Question 1 is worth 5 points …

MATH399 Statistics—Lab Week 2 Question 1 is worth 5 points and each question after that is worth 4.5 points, for a total of 50 points for the lab. Name:_______________________ Statistical Concepts: · Using Excel · Graphics · Shapes of distributions · Descriptive statistics NOTE: Directions for all labs are given based on Excel 2013 for Windows. If you have another version of Excel, you may need to research how to do the same steps. Ø Excel is a powerful, yet user-friendly, data analysis software package. You can launch Excel by finding the icon and double clicking on it Ø Data have already been formatted and entered into an Excel worksheet. You will see the link on the page with this lab document. The names of each variable from the survey are in the first row of the worksheet. All other rows of the worksheet represent certain students’ answers to the survey questions. Therefore, the rows are called observations and the columns are called variables. Below, you will find a code sheet that identifies the correspondence between the variable names and the survey questions. Do NOT answer these questions. The code sheet just lists the variables name and the question used by the researchers on the survey instrument that produced the data that are included in the Excel data file. This is just information. The first question for the lab is after the code sheet. Drive Question   1: How long does it take you to drive to the school on average (to the   nearest minute)? State Question   2: In what state/country were you born? Shoe Question   3: What is your shoe size? Height Question   4: What is your height to the nearest inch? Sleep Question   5: How many hours did you sleep last night? Gender Question   6: What is your gender? Car Question   7: What color of car do you drive? TV Question   8: How long (on average) do you spend a day watching TV? Money Question   9: How much money do you have with you right now? Coin Question   10: Flip a coin 10 times. How many times did you get tails? 1. Create a frequency table for the variable State.In the Excel file, you can click on and then and choose as the variable on which to sort. Once sorted, you can count how many students are from each state. From that table, use a calculator to determine the relative percentages, as well as the cumulative percentages. In the box below, type the states from the database in a column to the left, then type the counts, and relative and cumulative frequencies to the right of the respective state. Using the data in the table, make a statement about what the frequency counts or percentages tell about the data. 2. Create a bar chart for the frequency table in Question 1. Select the State variable values. Click on and then click on the arrow on the bottom right of the area and select and click . (Again, different versions of Excel may need different directions.) Add an appropriate title and axis label. 3. Create a pie chart for the variable Car. Select the column with the Car variable, including the title of Car. Click on , and then . It should show a clustered column and click . Once the chart is shown, right click on the chart (main area)and select . Select and . Click on the pie slices, right click , and select . Add an appropriate title. Copy and paste the chart here. 4. Create a histogram for the variable Height. Use the strategies in the text to create a frequency table of the heights using the categories of 60–64, 65–69, 70–74, and 75–79. It may be ful to sort the data based on the Height variable first. Create a new worksheet in Excel by clicking on the + along the bottom of the screen and type in the categories and the frequency for each category. Then, select the frequency table, click on , then and choose the column chart shown and click . Right-click on one of the bars and select . In the pop up box, change the to 0. Add an appropriate title and axis label.Copy and paste the graph here. 5. Create a stem and leaf chart for the variable Money, using only the whole dollar amounts. This must be done by hand, as Excel cannot do this type of chart. Using the tens value as the stem and the ones value for the leaves, type a stem and leaf plot into the box below. It may be ful to sort the data based on the Money variable first. 6. Calculate descriptive statistics for the variable Height by Gender. Click on and then . Click in the top box and select all the data (including labels) from Height through Gender. Also click on new worksheet and then . On the right of the new sheet, click on Height and Gender, making sure that Gender is in the box and Height is in the box. Click on the down arrow next to Heigh in the Values box and select . In the pop up box, click ,then . Type in the averages below. Then, click on the down arrow next to Height in the Values box again and select Value Field Settings. In the pop up box, click on thenOK. Type the standard deviations below. Mean Standard Deviation Females Males Ø Select > to save the data set. You must either keep a copy of this data or download it again off the website for future labs. All answers should be complete sentences. 7. What is the most common color of car for students who participated in this survey? Explain how you arrived at your answer. 8. What is seen in the histogram created for the heights of students in this class (include the shape)? Explain your answer. 9. What is seen in the stem and leaf plot for the money variable (including the shape)? Explain your answer. 10. Compare the mean for the heights of males and the mean for the heights of females in these data. Compare the values and explain what can be concluded based on the numbers. 11. Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class.Compare the values and explain what can be concluded based on the numbers.

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