Topics: Frequency distribution, Frequency, Summary statistics Pages: 3 (604 words) Published: November 2, 2012
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BUQU 1230
Assignment #1

Solve the following 3 problems:

1- Consider the data set for the sample of 10 minisystems that is posted on the course web site. Open the Excel “Minisystems” file and answer the following questions: a. What are the elements in this study? How many elements are in the data set? Brand & Model

b. How many variables are in the data set?
5 Variables (Price, Sound Quality, CD Capacity, FM Tuning, and Tape Decks) c. Which of the variables are quantitative and which are categorical? Categorical: Sound Quality, FM Tuning, and Tape Decks

Quantitative: Price and CD Capacity
d. What is the average CD capacity for the sample?
3
e. What percentage of the minisystems provides an FM tuning rating of very good or excellent? 40% + 30% = 70%
f. What percentage of the minisystems includes two tape decks? 40%
g. Report the average price of minisystems for different classes of Sound Quality. |Fair |170 |
|Good |314 |
|Very Good |350 |

2- Suppose that there are 30 students in a classroom and that they have a grade point average listed in the following table. Construct a frequency distribution table that summarizes the data into 6 classes. Calculate relative frequency and percent frequency for each class and use a graphing technique to chart your data. What type of chart would you use to present the frequency and percent frequency for this data?

Student GPAs:
1.23.91.9
3.82.42.7
2.32.32.6
0.73.13.7
3.62.94.0
2.22.71.2
1.90.81.8
2.10.32.4
3.13.23.2
0.83.13.6

|GPA |Frequency |Relative |Percent | | | |Freq. |Freq. |
|0-0.69 |1 |0.03...