Know the mean and standard deviation, how to calculate t value, and chi square? The data are as follows Group A: 88.9 ± 12.6 * 77.4 ± 10.3 * 99.0 ± 0.8 Group B: 108.4 ± 13.4 88.3 ± 13.5 98.8 ± 0.8 Group A: 86.3 ± 11.2 * 73.4 ± 9.3 * 98.9 ± 1.1 Group B 102.6 ± 13.3 83.3 ± 11.5 99.0 ± 1.0 If convenient, help to see the p value, with the * sign for the comparison

Know the mean and standard deviation, how to calculate t value, and chi square? The data are as follows Group A: 88.9 ± 12.6 * 77.4 ± 10.3 * 99.0 ± 0.8 Group B: 108.4 ± 13.4 88.3 ± 13.5 98.8 ± 0.8 Group A: 86.3 ± 11.2 * 73.4 ± 9.3 * 98.9 ± 1.1 Group B 102.6 ± 13.3 83.3 ± 11.5 99.0 ± 1.0 If convenient, help to see the p value, with the * sign for the comparison

There is no way to calculate chi square for such data. Chi square is usually used for counting data

How to calculate the standard deviation between a number and the average
The average of a series of data is 46, and the standard deviation is 4. Which number and the standard deviation of the average is exactly 1.5
The answer is 52. How

Z = (M-X) / s, where m is the required number, X is the mean, s is the standard deviation, and Z is the Z value in the normal distribution
M = 1.5 * 4 + 46 = 52. 1.5 in the question is not called standard deviation, but Z value. Otherwise, there are two standard deviations in the question, and there is only one standard deviation in a series of data

What is the relationship between mean and standard deviation?

Mean and standard deviation are important indexes reflecting data distribution in statistics
Mean: a measure of the trend in a dataset. Its typical formula is:
Mean a = (x1 + x2 + X3 +. + xn) / N standard deviation: it is a measure of the trend of data dispersion. Its typical formula is as follows: