Many couples believe that it is getting too expensive to host an "average" wedding in the united states. according to the website the average cost of a wedding in the u. s. in 2009 was $24,066. recently, in a random sample of 40 weddings in the u. s. it was found that the average cost of a wedding was $23,224, with a standard deviation of $2,903. on the basis of this, a 95% confidence interval for the mean cost of weddings in the u. s. is $22,296 to $24,152.

Given the points a(-2, 1) and b(8, 6), find the coordinates of the point c on directed line segment ab, that partitions ab in the ration 2: 3.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Consider a bag that contains 220 coins of which 6 are rare indian pennies. for the given pair of events a and b, complete parts (a) and (b) below. a: when one of the 220 coins is randomly selected, it is one of the 6 indian pennies. b: when another one of the 220 coins is randomly selected (with replacement), it is also one of the 6 indian pennies. a. determine whether events a and b are independent or dependent. b. find p(a and b), the probability that events a and b both occur.