Agent 006 is hired to test the destructiveness of the government's new YI0489 missile. She tests 80 rockets, and by assuming normality, she calculates a 95% confidence interval for their destructive force as (371.22, 549.26). Required:
What was the average of Agent 006's 80 rockets?

Can someone check my answer? you : )

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Find the value of x. round the length to the nearest tenth