Week 2 Project @ Prof_Dismuz
meme81
WK2Project.docxWeek 2 Project - STAT 3001
Student Name: <Type your name here>
Date: <Enter the date on which you began working on this assignment.>
Instructions: To complete this project, you will need the following materials:
· STATDISK User Manual (found in the classroom in DocSharing)
· Access to the Internet to download the STATDISK program.
This assignment is worth a total of 60 points.
Part I. Histograms and Frequency Tables
|
Instructions |
Answers |
||||||||||||||||||||||||
|
1. Open the file Car Measurements using menu option Datasets and then Elementary Stats, 13th Edition. This file contains some information about car measurements. What are the names of the variables in this file?
|
|
||||||||||||||||||||||||
|
2. Create a histogram for the weight of the cars using the Auto-fit option. Paste the chart here. Once your histogram displays, click Bar Labels to get the height of the bars. |
|
||||||||||||||||||||||||
|
3. Using the information in the above histogram, complete this table. Be sure to include frequency, relative frequency, and cumulative frequency. |
|
||||||||||||||||||||||||
|
a. Using the frequency table above, how many of the cars have a weight of less than 3250 lb? How do you know? |
|
||||||||||||||||||||||||
|
b. Using the frequency table above, how many of the cars weigh between 2750 and 4249.9 lb? Show your work. |
|
||||||||||||||||||||||||
|
c. What percent of the cars weigh 3750 lb or more? |
|
Part II. Comparing Datasets
|
Instructions |
Answers |
|
1. Create a boxplot that compares the city and highway MPG of the cars. Paste it here. |
|
|
2. Describe the similarities and differences in the data sets. Please be specific to the graph created. |
|
Part III. Finding Descriptive Numbers
|
Instructions |
Answers |
|||||
|
3. Open the file named Oscar Winner Age (using Datasets and then Elementary Stats, 13th Edition). This gives information on the age of actresses and actors at the time they won an Oscar. List all the variables in the dataset. |
|
|||||
|
4. Find the mean, median, and midrange for the Data in Column 1. |
|
|||||
|
5. Find the range, variance, and standard deviation for Column 1. |
|
|||||
|
6. List any values for the first column that you think may be outliers. Why do you think that? [Hint: You may want to look at the modified boxplot and sort the data and look at the smallest and largest values.] |
|
|||||
|
7. Find the Mean, median, and midrange for the data in Column 2. |
|
|||||
|
8. Find the Range, variance, and standard deviation for the data in Column 2. |
|
|||||
|
9. List any values for the second column that you think may be outliers. Why do you think that?
|
|
|||||
|
10. Find the five-number summary for the actress and actor data in Columns 1 and 2. You will need to label each of the columns with an appropriate measure in the top row for clarity. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
11. Compare the age of actresses and actors using a boxplot of Columns 1 and 2. Paste your boxplot here.
|
|
|||||
|
12. Create a histogram for the Column 1 data and paste it here. |
|
|||||
|
13. Create a histogram for the Column 2 data and paste it here. |
|
Part IV. Interpreting Statistical Information
The Oscar Winner Age data set consists of the age (years) of actresses and actors at the times that they won Oscars for the categories of Best Actress and Best Actor. The data are complete as of the writing of this textbook.
Using the descriptive statistics found above, what conclusions can you make comparing the age of actresses and actors. You want to address EACH of the following points below. Please be sure to use SPECIFIC values to support your reasoning (hint: you will want to consider the descriptive statistics found in Part III as well as the histograms). You must justify your conclusions with Statdisk output from Part III of this project for each portion below.
a. One conclusion about a measure of center (mean, median, midrange).
b. One conclusion about the variability in the two datasets (variance, standard deviation, range)
c. One conclusion about the shape of the distribution (mention direction of skew and relationship of the mean and median).
Submit your final draft of your Word file by going to Week 2, Project, and follow the directions under Week 2 Assignment 2Please use the naming convention "WK2Assgn2+first initial+last name" as the Submission Title.
3
