1. Place the following scores in a frequency distribution table. Include columns for proportion (p) and percentage (%) in your table. The scores are: 4, 6, 2, 9, 8, 8, 5, 7, 7, 3, 6, 6, 7, 4, 5, 8, 6, 5

2. Under what circumstances should you use a grouped frequency distribution instead of a regular frequency distribution?

3. What information is available about the data in a regular frequency distribution table that is not available in a group table?

4. Describe the difference in appearance between a bar graph and a histogram, and describe the circumstances under which each type of graph should be used

5. The following are reading comprehension scores for a third-grade class of 18 students: 4, 5, 5, 6, 4, 5, 2, 6, 3
5, 6, 5, 4, 3, 6, 1, 6, 5
a. place the scores in a frequency distribution table.
b. sketch a histogram showing the distribution*
c. using your graph answer the following questions:
a. What is the shape of the distribution?
b. If a score of x=4 is considered typical for third-graders.
* (you should include the histogram. You can draw by hand or use a program such as SPSS and cut and paste into your document)

7. Complete the following frequency distribution table, and find each of the percentiles and percentile ranks requested:
X f cf c%
10 1
9 3
8 7
7 6
6 2
5 1

a. what is the percentile for x=7.5
b. what is the percentile for x=9.5
c. what is the 15th percentile?
e. what is the 80th percentile?

... qualitative but can be reported in a frequency diagram. Describe the properties of a normal distribution. Why are there infinite possible normal distributions? ...

... 2. I have considered the first class, in the frequency distribution, to be ... 2 classes (5 - 59 and 60 - 114) and the cumulative frequency distributions cannot be ...

Describe a grouped frequency distribution; Percentile and rank. Week 2 Problem Sets. 2. a 9 b 31 c 119. ... Therefore, we use a grouped frequency distribution. ...

... However, if the data distribution is skewed, it affects the usability of ... and a uniform value of the spread cannot be applied to such frequency distributions. ...

...distribution, although there is that little skewness on the right-hand side. Any basic statistics book includes a presentation of frequency distributions, eg ...

... 26, 2012, from: http://www.khanacademy.org/math/statistics/v/introduction-to-the- normal-distribution Slides on frequency distributions, Retrieved November 26 ...

... table (the frequency of the specific number) this is what we call a frequency distribution. Please note that the summation of the frequencies should be 24 ...