This paper reports that carried out 64 cases of endemic cretinism from 1794 examinee, and was distributed over 340 doors of 176 familial systems. The results indicated the endemic cretinism belongs to polygenic inheritance, which the weighted mean genetic rate and standard error were 78.51±7.54, by the theory of segregational study and polygenic threshold levels.

mRNA in collagen of chondrocytes of the rib cartilage reached the peak level 15 days after exposure to fluoride, and decreased gradually one month and two months after exposure.

Results Logistic regression model based on principal component analysis can improve the estimating of parameters and decrease the standard errors significantly.

The pooled weighted sensitivity and specificity of FDT with 95% confidence intervals (95% CI) after correction for standard error were 0.86 (0.80-0.90) and 0.87 (0.81-0.91), respectively.

The standard error of determination of the active form of IAA by our method is 1.5-2.0 times less than that using the traditional method.

It is shown that the standard error in the measurements does not exceed 0.1log(η).

The total relative standard error for applying the method to 20 synthetic samples in the concentration ranges of 20-400 ng/mL Co(II), 60-400 ng/mL Ni(II), and 4-400 ng/mL Cu(II) was 1.53%.

However, stochastically independently selected specimens show a larger deviation than the standard error of the calibration.

Body weight and height of 10,672 adults (male 6534, female 4318) aged from 18 to over 46 including various kinds of job were investigated in north district of China. The body weight and height were measured by conventional method. All the subjects were divided into three aged groups (18-25, 26-45, over 46) in both sexes respectivly. The correlation regression between height and weight was calculated and significance test of regression coefficient was made.The results showed that the positive correlation was...

Body weight and height of 10,672 adults (male 6534, female 4318) aged from 18 to over 46 including various kinds of job were investigated in north district of China. The body weight and height were measured by conventional method. All the subjects were divided into three aged groups (18-25, 26-45, over 46) in both sexes respectivly. The correlation regression between height and weight was calculated and significance test of regression coefficient was made.The results showed that the positive correlation was seen between the height and weight in each aged group. There were significant differences between all of aged groups in regression coefficient significance tests, except between 18-25 and 26-45 aged group in female. According to theory of normal distribution, the five types of body were defined in term of mean of height (X) and standard deviation (Sx), namely tallest, taller, middle, lower, lowest. The average of body weight corresponding to height was calculated by regression equation in each group. Meanwhile, standard error (Sy) and 95% distribution range of individual value was calculated in regression line. As mentioned above body weight was divided into five classes (overweight, upper middle, middle, lower middle, underweight). The normal value established in the survey can be used for estimation of nutritional status of adult in north China.

The standing length and crown rump length of 129 human fetuses from 13 to 38 weeks of age were measured.The data were analys- ed with an Apple (?) computer.The regression equation that age of fetus is in dependent rariable and standing length and crown rump length are dependent variable was obtained.The average and stand- ard deviation and standard error and 95% confidence interval of diff- erent ages of fetus were calculated.The data obtained were compared with internal and external citerature about this subject....

The standing length and crown rump length of 129 human fetuses from 13 to 38 weeks of age were measured.The data were analys- ed with an Apple (?) computer.The regression equation that age of fetus is in dependent rariable and standing length and crown rump length are dependent variable was obtained.The average and stand- ard deviation and standard error and 95% confidence interval of diff- erent ages of fetus were calculated.The data obtained were compared with internal and external citerature about this subject.

This paper reports that carried out 64 cases of endemic cretinism from 1794 examinee, and was distributed over 340 doors of 176 familial systems. The results indicated the endemic cretinism belongs to polygenic inheritance, which the weighted mean genetic rate and standard error were 78.51±7.54, by the theory of segregational study and polygenic threshold levels.