The first step when you want to graph the data points into a box and whisker plot, arrange the data points from lowest to highest:
<span>28,29,29,31,34,39,41,46,47,49,52,54 </span> Next, find the median of the data. This is the middle value. Since it contains an even number of 12, take the average of the 2 middle values.
Median = (39+41/2 = 40
Now, divide the data down to the middle. The groups would be:
28,29,29,31,34,39 and 41,46,47,49,52,54
Now, take the median of each group. For the lower half, the median is equal to (29+31)/2 = 30. For the upper half, the median is equal to (47+49)/2 = 48.
Therefore, the box starts from 30 and ends at 48. Then, a line is drawn in between at the median 40. Then, the whiskers are added by drawing lines from the lowest at 28 to the start of the box at 30, and from the end of the box at 48 to the highest value at 54.
Hence, the box and whisker plot for this data is letter A or the first choice.
Let S be the amount in a savings account. Let m be the number of months.
General equation S = 132 + 27m
Specific question July is the 7th month of the year including both January and July. S = 132 + 7*27 S = 132 + 189 S = 321
Reasonableness? Good question. You could estimate an answer. Start with 150 dollars and say that you add 25 a month. 7 * 25 = 175 S = 150 + 175 = 325 All of this was done in my head. Since the exact answer obtained using the formula is 321, I think that's pretty reasonable using my estimate is a guide.
