An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 250250 engines and the mean pressure was 6.86.8 pounds/square inch (psi). Assume the population standard deviation is 0.60.6. If the valve was designed to produce a mean pressure of 6.76.7 psi, is there sufficient evidence at the 0.10.1 level that the valve performs above the specifications?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

The anwser cause i do not understand just plez

Which of the following describes how to translate the graph y = |x| to obtain the graph of y = |x+1|+1? shift 1 unit left and 1 unit down shift 1 unit left and 1 unit up shift 1 unit night and 1 unit down shift 1 unit nght and 1 unit up