The expression you're dealing with is:

$P(10 < \chi^2_9)$

This is asking for the probability that a chi-squared random variable with 9 degrees of freedom ($\chi^2_9$) takes a value greater than 10. This type of problem is typically solved using a chi-squared distribution table or statistical software to find the probability.

Steps to solve:

1. Recognize that this represents a chi-squared distribution with 9 degrees of freedom.
2. You're looking for the probability that the value of the chi-squared statistic is greater than 10.
3. To find this, you would look up the cumulative probability at 10 in a chi-squared distribution table with 9 degrees of freedom, or use a calculator.
4. Subtract the cumulative probability from 1 to get the tail probability (since you're looking for $P(\chi^2 > 10)$).

I'll compute this for you.The probability that a chi-squared random variable with 9 degrees of freedom is greater than 10 is approximately $P(10 < \chi^2_9) = 0.3505$, or about 35.05%.

Do you need any further explanation or details on how this is calculated?

Here are some related questions:

1. What is the cumulative probability for $\chi^2_9$ at different values?
2. How does the chi-squared distribution change with different degrees of freedom?
3. Can you explain what situations the chi-squared distribution is commonly used for?
4. How would the probability change if the value was greater than 10, such as 15 or 20?
5. How is the chi-squared distribution related to hypothesis testing?

Tip: The chi-squared distribution is often used to test independence or goodness-of-fit in categorical data analysis.