Question

93 3 pts Question2 Travel Agency A travel agency priced tickets between Chicago and Orlando. The passenger was to fly coach class round-trip, staying seven days. Calls were made directly to airlines and to travel agents with the following results. Note that the data reflects round-trip airfare. $227.00 $345.00 $600.00 $228.00 $428.00 $603.00 345.00 $229.00 $605.00 $339.00 $279.00 $407.00 Find the standard deviation of the quoted fare. (Round to the nearest 2 decimal places if needed). D Question 3 3 pts Shopping Duration Distribution Recently, a store manager tracked the time customers spent in the store from the time they took a number until they left. A sample of 12 customers was selected and the following data was recorded; where the frequency is the number of customers and 26 MacBook Ai

Answer 1

2. To find standard deviation we need to first find mean= $\mu=\frac{\sum x}{n}=386.25$

Create the following table.

data	data-mean	(data - mean)2
227	-159.25	25360.5625
345	-41.25	1701.5625
600	213.75	45689.0625
228	-158.25	25043.0625
428	41.75	1743.0625
603	216.75	46980.5625
345	-41.25	1701.5625
229	-157.25	24727.5625
605	218.75	47851.5625
339	-47.25	2232.5625
279	-107.25	11502.5625
407	20.75	430.5625

Find the sum of numbers in the last column to get. $\sum (xi-\overline{x})^2=234964.25$

Hence $\sigma=\sqrt{\frac{\sum (xi-\overline{x})^2}{n-1}}=\sqrt{\frac{234964.25}{12-1}}=146.1519$