According to an nrf survey conducted by bigresearch, the average family spends about $237 on electronics (computers, cell phones, etc.) in back-to-college spending per student. suppose back-to-college family spending on electronics is normally distributed with a standard deviation of $54. if a family of a returning college student is randomly selected, what is the probability that: (a) they spend less than $155 on back-to-college electronics? (b) they spend more than $340 on back-to-college electronics? (c) they spend between $115 and $190 on back-to-college electronics?

Label each of the following statements true, false, or uncertain. explain your choice carefully. a. workers benefit equally from the process of creative destruction. b. in the past two decades, the real wages of low-skill u.s. workers have declined relative to the real wages of high-skill workers. c. technological progress leads to a decrease in employment if, and only if, the increase in output is smaller than the increase in productivity. d. the apparent decrease in the natural rate of unemployment in the united states in the second-half of the 1990s can be explained by the fact that productivity growth was unexpectedly high during that period.