Quiz of the applied knowledge of statistics

　The answer of quiz is white letter.

Question1

The table under this sentence is the result of mathematics and Japanese test.Answer the question.
Jpanese811052107386
Mathematics102α3288396
The average of japanese test is that of mathematics test.
(1)What is α?
(2)Calculate correlation coeffcient of the score of mathematics and Japanese test.
Answer

Question2

A table under this sentence is correlative table of the score that ten music university students evaluated by piano and recorder performance.Calculate correlation coeffcient of the score of piano and recorder.
Piano→
↓Recorder		0point1point2pointsSum
0point0101
1point1315
2points0224
Sum16310

Answer