Eliza takes care to illustrate in her research report how long she was in the field and how she has minimized observer effects. In her efforts to address these concerns, Eliza is most directly addressing:.a. threats to internal validity. b. threats to external validity. c. ethics concernsd. reliability

Customers arrive at rich dunn's styling shop at a rate of 3 per hour, distributed in a poisson fashion. rich can perform an average of 5 haircuts per hour, according to a negative exponential distribution. a) the average number of customers waiting for haircuts= customersb) the average number of customers in the shop= customersc) the average time a customer waits until it is his or her turn= minutesd) the average time a customer spends in the shop= minutese) the percentage of time that rich is busy= percent

Me this has caused me stress and my head hurts

Whom do progressive taxes assess? a. only a large percentage of high-income households b. only a large percentage of organizations c. a large percentage of high-income households and organizations d. a large percentage of low-income households e. a small percentage of high-income households