def find_nb_genes(data):
data_means = data.mean(<NUM_LIT:1>)<EOL>data_vars = data.var(<NUM_LIT:1>)<EOL>nb_indices = data_means < <NUM_LIT>*data_vars<EOL>return nb_indices<EOL>
Finds the indices of all genes in the dataset that have
a mean < 0.9 variance. Returns an array of booleans.