A department store wants to know if there is a difference between the proportions of older (50+) and younger (<50) customers at their store. Employees randomly select a sample of 670 customers. The table below shows the frequency table for the customer categories. Older Younger Total Observed 312 358 670 Perform a goodness of fit hypothesis test (a=0.05) to test whether there is evidence that the observed frequencies are significantly different from the expected frequencies