Answer:
The null hypothesis is
The alternative hypothesis is
The conclusion is
There is no sufficient evidence to conclude that there is a difference between the variances of salaries for seniors and managers
Step-by-step explanation:
From the question we are told that
The variance for seniors is 
The variance for managers is 
The first sample size is 
The second sample size is 
The significance level is 
The null hypothesis is
The alternative hypothesis is
Generally the test statistics is mathematically represented as

=> 
=> 
=> 
Generally the p-value is obtain for the F-distribution table (Reference - Free statistic calculator ) at a degrees of freedom


and 

The p- value is

So from the calculation we see that

So we fail to reject the null hypothesis