The square of half B is reduced to
Half B squared = half B squared times b squared = quarter B squared
RELATED INFORMATIONS
- 1. Known samples x1, X2 If the variance of XN is 2, then the sample is 3x1 + 2, 3x2 + 2 The variance of 3XN + 2 is______ .
- 2. Data x1, X2 If the average of XN is 5 and the variance is 2, then 3XL + 2, 3x2 + 2 The average of 3XN + 2 is______ The variance is______ .
- 3. A set of data x1, X2 The average of XN is 90, the variance is 13.5, then 3x1-80, 3x2-80 The average of 3xn-80 is______ The variance is______ .
- 4. Given a set of data x1, X2 The variance of x 10 is s ^ 2 = 6, find another set of data 1 / 3x1,1 / 3x2 What is the variance of 1 / 3x10? That's x, subscript 1, and so on
- 5. If the average number of one set of data x1, X2, and X10 is 5, then the average number of another set of data X1 + 2, X2 + 2, and X10 + 2 is 5
- 6. Given a set of data x1, X2, X3, the variance of X10 is 2, and (x1-3) ^ 2 + (x2-3) ^ 2 + (x3-3) ^ 2 +... + (x10-3) ^ 2 = 120, find the average X
- 7. Given a set of data x1, X2 The average of x1, X2, X3 is a, x4, X5, X6 , the average of X10 is B, then the average of this set of data is () A. a+b2B. 3a+7a10C. 7a+3b10D. a+b10
- 8. It is known that the average and variance of a group of data x1, X2... And X10 are 3 and 2, respectively. Then the average and variance of another group of data 2x1-1, 2x2-1... And 2x10-1 are respectively 3 and 2
- 9. The variance of data x1, X2, and X10 is 2 (x1-3) square + (x2-3) square +,,, + (x10-3) square = 120 to find the average of X
- 10. The variance of a group of data S2 = [(x1-2) 2 + (x2-2) 2 +...] +(x10-2) 2], then the average of this set of data is_______ .
- 11. Simplification ratio: 5 square meters to 50 square decimeters
- 12. Simplification ratio: 4 / 5 kg: 30 g, 5 cm: 0.1 M, 1 / 3 h: 0.3 M2: 750 M2
- 13. 100 square decimeter: 1 square meter. 2 tons: 250 kg reduction ratio
- 14. One half square meter = () square decimeter, three tenths of a ton = () kilogram, three fourths of a hour = () minute, four fifths of a second = () 10 × 7 / 15=
- 15. Representation of set {2,4,6,8} by description Little brother, just on the road, not many points So {x | x = 2,4,6,8} right? Which is right? I feel right
- 16. The set {(0,3), (3,0), (1,2,), (2,1)} is represented by description
- 17. The set {1,1 / 2,1 / 3,1 / 4} is represented by the description method, and {1,1 / 2,1 / 3,1 / 4} represents the fractional line, Can it be written as {x │ (x-1) (x-1 / 2) (x-1 / 3) (x-1 / 4)} Please say why,
- 18. The set 1 / 2,2 / 3,3 / 4,4 / 5 is represented by description,
- 19. The set {1,1 / 2,1 / 3,1 / 4} is represented by description,
- 20. Split term method (- 1000 and 2 / 3) - 999 and 5 / 6 - (- 2000 and 3 / 4) - 1 and 1 / 2