# Figure 3.2a The proportion of scores less than or equal to 6.0 in the actual data is 0.303. - PowerPoint PPT Presentation

1 / 13

Figure 3.1 Histogram of the Iowa Test vocabulary scores of all seventh-grade students in Gary, Indiana. The smooth curve shows the overall shape of the distribution. Figure 3.2a The proportion of scores less than or equal to 6.0 in the actual data is 0.303.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Figure 3.2a The proportion of scores less than or equal to 6.0 in the actual data is 0.303.

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

#### Presentation Transcript

Figure 3.1 Histogram of the Iowa Test vocabulary scores of all seventh-grade students in Gary, Indiana.The smooth curve shows the overall shape of the distribution.

### Figure 3.2a The proportion of scores less than or equal to 6.0 in the actual data is 0.303.

Figure 3.2b The proportion of scores less than or equal to 6.0 from the density curve is 0.293. The density curve is a good approximation to the distribution of the data.

### Figure 3.9 The 68–95–99.7 rule for Normal distributions.

Figure 3.10 The 68–95–99.7 rule applied to the distribution of Iowa Test scores for seventh-grade students in Gary, Indiana, for Example 3.2. The mean and standard deviation are m = 6.84 and s = 1.55.