目前看身高和年龄的关系不太大

年龄和身高没关系，没研究意义

显著关系是看F值吧，p表示概率

Significance level (p) depends on effect size, sample size, among other things.

Given that your sample size is small, p is higher than .05, which is foreseeable.

Alternatively said, even there is strong relationship between 2 variables (big effect size), as long as you have a small sample size, all else being equal, you are likely to obtain non-sig. results.

Your p-value is .088, which is lower than .10. You may still claim it as marginally significant. Not too bad....