Asimple random sample of 60 items resulted in a sample mean of 95. the population standard deviation is 12. a. compute the 95% confidence interval for the population mean (to 1 decimal). ( , ) b. assume that the same sample mean was obtained from a sample of 120 items. provide a 95% confidence interval for the population mean (to 2 decimals). ( , )

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?