A particular airline wants to know how its customers feel about its service. Every day during the survey period, it randomly selects 10 flights, and asks all of the passengers on these flights to fill out a short questionnaire. This type of sampling design is called.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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 base of a rectangular pyramid is 13 inches long and 12 inches wide. the height of the pyramid is 8 inches. what is the volume of the pyramid