william is thinking of two numbers both numbers are square numbers greater than 1 the sum of numbers is 100 write down two numbe
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Answer:
Step-by-step explanation:
According to the attached figure, Jaxon is positioned 10 blocks east and 5 blocks north.
Thus, Jaxon's x-coordinates are 10 units, while the y-coordinates are 5 units.
Therefore, the coordinates are given by (10,5)
Similarly, Isaac's coordinates are determined based on his distances towards the west and south.
Hence, the x-coordinates equal 8 units and the y-coordinates equal 15 units.
Thus, Isaac’s coordinates are depicted as (-8,-15).
Answer:
1. 3.767
2. 0.145
Step-by-step explanation:
Define X as the exam scores and Y as the number of drinks.
X Y X-Xbar Y-Ybar (X-Xbar)(Y-Ybar) (X-Xbar)² (Y-Ybar)²
75 5 -2.3 2.3 -5.29 5.29 5.29
92 3 14.7 0.3 4.41 216.09 0.09
84 2 6.7 -0.7 -4.69 44.89 0.49
64 4 -13.3 1.3 -17.29 176.89 1.69
64 2 -13.3 -0.7 9.31 176.89 0.49
86 7 8.7 4.3 37.41 75.69 18.49
81 3 3.7 0.3 1.11 13.69 0.09
61 0 -16.3 -2.7 44.01 265.69 7.29
73 1 -4.3 -1.7 7.31 18.49 2.89
93 0 15.7 -2.7 -42.39 246.49 7.29
sumx=773, sumy=27, sum(x-xbar)(y-ybar)= 33.9, sum(X-Xbar)²= 1240.1,sum(Y-Ybar)²= 44.1
Xbar=sumx/n=773/10=77.3
Ybar=sumy/n=27/10=2.7
1.
Cov(x,y)=33.9/9
Cov(x,y)=3.76667
Thus, the sample covariance of exam scores and energy drink consumption is 3.767
2.
Cor(x,y)=r=33.9/233.85553
Cor(x,y)=r=0.14496
The sample correlation coefficient for the relationship between exam scores and energy drink consumption is 0.145.