You are interested in finding out if how much people enjoy watching 'thriller' movies depends on their age. You survey people over several weeks and create two groups; group 1 that consists of people under the age of 50. And group 2 that consists of people over 50. Each individual in each group is asked to watch a certain "thriller" and rate it on a scale of 1 to 10. The first sample has 150 individuals who give an average rating score of 7.72 with a standard deviation of 1.29. The second sample has 158 individuals who give an average rating score of 5.72 with a standard deviation of 2.70. Assuming that the variance in both segments of the population are the same, calculate the pooled variance of the two groups.