In hilly areas, farmers often contour their fields to reduce the erosion due to water flow. this might have the unintended effect of changing the yield since the rows may not be aligned in an east-west direction to take advantage of direct sunlight.

the following summary statistics show the yields in hundreds of bushels per acre of randomly selected plots of land along hillsides as well as level plots of land nearby with similar soil characteristics.

quartiles

type minimum 10% 25% median 75% 90% maximum
hilly 10.9 10.9 13.3 29.2 58.1 97.4 100%
level 10.9 11.2 18.5 39.3 61.5 103.4 118

means and standard deviations

type number mean standard deviation standard error of mean
hilly 12 39.7 30.4 8.8
level 12 44.6 31.1 9.0

a) describe and compare the distributions.
b) based on your plots, what can you conclude about the types of land.

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.  

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you