The manager of a grocery store has taken a random sample of…

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes. At a .05 level of significance, it can be concluded that the mean of the population is

Anne earns a gross yearly salary of $[Sal]. She has no depen…

Anne earns a gross yearly salary of $[Sal]. She has no dependent children and made the following tax deductible purchases: Charitable contributions: $[C]Student loan interest: $[S] When she files her taxes, what will her tax refund be? Round your answer to the nearest dollar.  Use the following information: Standard deduction for single filers: $15,750 For your final answer proceed as: Annual Income Tax Pay/Refund = Total Annual Withholding – Final Income Tax. If the person has to pay the government, type the number with a negative sign. For example -1280. If the person has to receive a refund from government, type the number without sign. For example 1280.