which variable is unknown to the sample and which variable has an effect on x_m in a random variable when do i test x_1 if y is a random variable which variables are not random variable what variable can i test for in a data sample test if random variable is nonrandom can I test if the variable in $X_1 is an unknown variable what is the random variable for $x_ which statement to use when calculating random variables if the variable $x_1 is x_2, how can the test for that variable be performed with j what is the test for using a random sample how to test p value of random variable how to determine if t is the random variable how do i find out if x is x_m$ how to test if x_m is an unknown variable what variable is used for a test? what is the value of x_1 if it is a random variable if a variable is a nonrandom variable what does this test for how to test py x how to test for a value of zero