A quality control manager claims that the variance in the lifespans of a certain type of lightbulb is exactly $36$ $\text{hours}$. To test this claim, a random sample of $18$ bulbs is selected, and the sample variance is found to be $42$ ${\text{hours}}^2$. At the $\alpha =0.05$ significance level, test the manager's claim. Assume the lifespans are normally distributed.

There is sufficient evidence to support the manager's claim that the population variance is greater $36$ ${\text{hours}}^2$

There is sufficient evidence to reject the manager's claim that the population variance is exactly $36$ ${\text{hours}}^2$

There is no sufficient evidence to reject the manager's claim that the population variance is exactly $36$ ${\text{hours}}^2$

There is sufficient evidence to conclude that the population variance is less than $36$ ${\text{hours}}^2$