42, 44, 57, 45, 66, 55, 48, 44, 51, 47, 60, 54, 48, 53 the average is 51 s²=？

s²40.3

RELATED INFORMATIONS

1. If the average of the first four numbers is 33 and the average of the last four numbers is 42, find the median of the group
2. There are seven numbers from small to large, the average is 38, if the average of the first four numbers in this group is 33 There are seven numbers from small to large, with an average of 38. If the average of the first four numbers in this group is 33 and the average of the last four numbers is 42, what is the median of these seven numbers?
3. There are seven numbers in order from big to small, the average is 38. The average of the first four numbers is 33, and the average of the last four numbers is 42. Find the median of these seven numbers
4. There are 7 data from small to large, the average is 38. If the average of the first four numbers is 33, and the average of the last four numbers is 42, try to find the median of this group of data
5. In a group of data, 40, 39, 41, 43, 50, 44, 60, 51, 46 is more appropriate to use median or average The weight of female students in the first group of six-year class is as follows: 40, 39, 41, 43, 50, 44, 60, 51, 46. Is it more appropriate to use median or average to represent the weight of female students in this group The weight of female students in the first group of six-year class is as follows: 40, 39, 41, 43, 50, 44, 60, 51, 46. Is it more appropriate to use median or average to represent the weight of female students in this group? Why
6. In a group of data, 40, 39, 41, 43, 50, 44, 60, 51, 46 is more appropriate to use median or average, why 0
7. After Xiao Liang calculated the average of 50 data, he carelessly mixed the average with the original 50 data to form 51 data. He forgot that it was the average. If the average of the 51 data happened to be 51, what was the average of the original 50 data? Solving a series of equations
8. There are seven numbers in a row, their average is 32, the first three numbers are 28, the last five numbers are 33, find the third number
9. There are nine numbers in a row. Their average is 32. The average of the first five numbers is 28. The average of the last five numbers is 33?
10. There are seven numbers in a row. The average of them is 30. The average of the first three numbers is 28. The average of the last five numbers is 33
11. In order to connect a small "6V 3W" light bulb to a 24 V power supply and light normally, it is necessary to connect a series of resistors, the rated power of the resistor at least, and the total power of the whole circuit
12. Voltage: 220 V, frequency: 50 Hz, vibration frequency: 3200 / R - 2600 / R. I want to calculate the power
13. When electric energy is converted into heat energy, the power is directly proportional to the resistance of the conductor. The resistance of 880W electric furnace is 55ohm and 1100W The resistance of our electric furnace is 44 ohm. Why is the heat power of the electric furnace inversely proportional to the resistance?
14. The rated voltage of a motor is 220 V, the rated power is 1.1 kW, and the coil resistance is 5 How much a is the normal operation of the motor at 10:6? How much electric heat does it produce when it is electrified for 1min? (2) What is the reason that the motor is easy to burn out when it is fabricated
15. If the corresponding points of two rational numbers on the number axis are on the same side of the origin, then the product of the two rational numbers () A. Must be positive B. must be negative C. zero D. may be positive or negative
16. In RT △ ABC, ∠ C = 90 °, BC = 6, ab = 10, BD is the bisector of the angle to find the distance from point d to ab Point D is on AC
17. How to set the normal vector of the coordinate plane? For example, what are the normal vectors of the space coordinate system XYZ, xoy plane (there should be two zeros)
18. Given that the variance of one set of data x1, X2, X3 is 4, then the variance of another set of data 2x1 + 3, 2x2 + 3, 2x3 + 3 is 4（ What's the way of thinking, what's the formula,
19. In anbn, A1 = 36, B1 = 64, A100 + B100 = 100, then the sum of the first 200 items of anbn is
20. On the problems of discontinuities in Higher Mathematics f(x)=(1+x)/(1-x^2); X = - 1; X = 1; what kind of discontinuities are they; Let's talk about some ideas. In addition, this is just a question to fill in the blanks. I hope there will be a faster way to judge. Thank you