They are: credit and efficiency, level of variable and mathematical model, parametric test and nonparametric test, hypothesis test of mean and standard deviation, hypothesis test and analysis of variance, significant difference and non-significant difference, level of significance of correlation coefficient and osculation degree of correlation, statistics and physical education.
We get conclusions that suppose one area which is circled by left parts and statistic density curve is α_1 and the other area which is circled by right parts and statistic density curve is α_2, and α_1+α_2=α is level of significance, probability of making second kind mistake is indefinite and it has a definite dependent relation to parameter real value which is tested.
However, when dose was equal to 2krad, the difference of disease resistance was at the level of significance. CMV resistant mutants were selected from the population of haploid plant of NC89 and 8611 induced by 2 0krad of 60 Co γ ray.
The correlations of Ca2-P, Ca8-P and Al-P with crop yield reached a high level of significance. Among the three, Ca8-P was the best correlated with yield, and Fe-P, O-P and Ca10-P were also significantly correlated with yield.
The differences of MOR, MOE, radial crushing strength and impacting toughness in juvenile wood between natural forest and plantation reach 0.01 level of significance, and hardness of tangential section and tangential crushing strength reach 0.05 level of significance.
The differences of most mechanical properties in mature wood between natural forest and plantation also reach 0.01 level of significance. The basic tendency, which the mechanical properties of natural forest are higher than those of plantation, exhibits obviously in mature wood.
A basic tendency exhibited by all of the properties is that the properties of mature wood are higher than those of juvenile wood. The difference between MOE of juvenile wood and mature wood from plantations reaches 0.01 level of significance, and MOR and tangential crushing strength reach 0.05 level of significance.
The difference in MOE of natural Korean Pine also reached 0.01 level of significance and MOR, radial crushing strength, hardness of cross section and tangential crushing strength reached 0.05 level of significance.
Method: The expression of IL-8, CD34 in 60cases of tongue squamous cell carcinoma and 10 cases of tongue normal mucosa were examined by immunohistochemistry S-P method, Statistical analyses were carried out with the SPSS11.0 software, the level of significance was set to P<0.05.Result:
Results Bone mineral content (BMC) and bone ash weigtht were correlated at high level of significance with r=0.95 P<0.01, while bone mineral density(BMD) was showed a lower correlation with bone ash density (r=0.47,P<0.05).
The separation of positive and negative muons in a giant shower by the geomagnetic field is observed at a very high level of significance 0.03%.
When the period of the sine-wave curve was allowed to vary in order to fit the data best, none of the statistical tests reached the level of significance required to dismiss the possibility of false-positive results.
Correlations were sought between these measurements using the Pearson product-moment correlation with a level of significance of p = 0.05 (two-tailed).
A decrease (-4.3%) in total body weight was also found in men with Parkinson's disease but the difference did not reach the level of significance.
The possibility of substituting the direct spectrophotometric method for amino acid analysis was statistically evaluated; it does not seem to be rejected at the highest level of significance,P≤1%.