Answer:
Step-by-step explanation:
First choose a scale. Let us take 1 box as 0.1. Start the graph with something less than the lowest value for example 74 sounds reasonable. Add a straight line in the lowest value in the graph. Another line in the highest value. Now find the median (middle value) by using the formula:
n/2th value where n is the number of values.
The number of values is 15 so 15/2= 7.5th value. Round the number so we would get 8th value. If for example it was 7.25 then we would round to lower number 7. Cover the 8th value which is 79.8 Iowa and count either sides. You will get 7 on both side so this is our median. Draw a straight line for a median. Now find lower quartile. The lower quartile is the 1/4th value i.e. divides the graph in 1:3. We can use the formula n/4th value. 15/4= 3.75= 4th value which is Missouri 75.9. Draw another straight line for it. Now we have to find upper quartile which divides the graph in 3:4 value 3/4th of the graph. Use the formula 3n/4th value. 3*15/4= 11.25= 11th value. Which is California 80.9. Draw a straight line for that. Now connect the both quartiles and the median into a box and from the lowest to highest value, draw a line. Congrats! You drew your plot! I also did in the attachment.
