An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees was considered. Their mean salary was $34,000. Assume a population standard deviation of $4,000....

An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees was considered.  Their mean salary was $34,000. Assume a population standard deviation of $4,000. Does her claim seem reasonable at a 0.05 level of significance? WHAT CALCULATOR COMMAND IS NEEDED TO SOLVE THIS PROBLEM?