Question

I need help with 3b,3c,3d

This exercise also gives you practice with the ideas of Unit 1, Sections 4 ("Summaries for Qualitative Data") and 5 ("Graphical Summaries for Quantitative Data" "Data were recorded on the age in years and height in cm of 20 high school students in a classroom. Females Males Age Height Age Height 15 15 16 15 15 15 16 16 15 15 16 170 154 160 159 156 153 166 163 167 151 15 16 16 15 15 15 15 14 15 185 183 174 183 173 173 178 167 3a. By hand create a frequency table for age, with columns for frequency, relative frequency, cumulative frequency, and cumulative relative frequency 3b. By hand or using an applet on the web create a histogram for age. You might want to use the Shodor site histogram applet again for this: http://www.shodor.org/interactivate/activities/Histogram/ 3c. By hand or using an applet on the web create two stem-and-leaf displays for height, one for females and one for males. In one sentence, what does a comparison of the displays suggest about the students? Here is another applet to consider: http://www.shodor.org/interactivate/activities/StemAndLeafPlotter/ 3d. By hand or using an applet on the web, create two histograms for height, one for females and one for males. Use the same scale. http://www.shodor.org/interactivate/activities/Histogram/

Answer 1

b)

Histogram of Age for Males and Females

c)

Stem and Leaf Plots

From the above stem and leaf plots we can conclude that the mean height of females is less than males.

d)

We calculate the frequencies of Both Males and Females heights and then plot the below histograms.

Range	Females Freq
151-160	6
161-171	5
Range	Males Freq
167-176	4
177-186	5