An economist is interested in studying the incomes of consumers in a particular region. the population standard deviation is known to be $1,000. a random sample of 50 individuals resulted in an average income of $15,000. what total sample size would the economist need to use for a 95% confidence interval if the width of the interval should not be more than $100?

Liberty capital had seen its net income increase dramatically from the previous year, yet over the same period of time, its net cash provided from operations had decreased. which of the following would explain how this situation came about? liberty's expenditures on fixed assets had declined. liberty's depreciation and amortization expenses had declined. liberty's interest expense had increased. liberty's cost of goods sold had increased.

What will be the total costs for tara's first year at the out-of-state college?

Rose bought a mattress for her guest bedroom for $100, on sale. the mattress is nonreturnable. although everyone who has slept on the mattress said it was very uncomfortable, rose will not get rid of it because she spent $100 on it. what psychological factor associated with behavioral economics explains rose's behavior?