Formulating null and alternative hypothesis to test the claim.
A Wendy's franchise has been averaging about $5000 worth of business on a typical Saturday with a standard deviation of σ = $500. The manager is concerned that sales are slipping, after taking into account the average value of sales for four consecutive Saturdays being $4800.
Formulate an appropriate hypothesis test to examine at the 10 percent level of significance whether the manager's worries are justified.