Question

-14 points ASWSBE14 3.E.026. My Notes Ask Your Teacher Data collected by a price reporting agency from more than 90,000 gasoline and convenience stores throughout the U.S. showed that the average price for a gation of unleaded gasoline was $3.25. The following data show the price per gallon (6) for a sample of 20 ne and convenience stores located in San Francisco 3.59 3.79 4.59 3.56 3.55 3.71 3.65 3.60 3.75 3.56 3.57 3.59 3.35 4.19 4.15 3.55 3.63 3.73 (a) Use the sample data to estimate the mean price in dollars for a ton of unleaded gasoline in San Francisco (1) Compute the sample standard deviation in dollars. (Round your answer to the nearest cont.) (c) Compare the mean price per gallon for the sample data to the national average price. What conclusions can you draw about the cost of living in San Francisco The average price for a Galion of unleaded sine in San Francisco is have an average price close to the national average the national average. This indicates that the cost of living in San Francisco is it would be for oties that Need Help? The

Answer 1

Number	price in dollar	price in dollar-average price in dollar	square of (price in dollar-average price in dollar)
1	3.59	-0.17	0.0289
2	3.79	0.03	0.0009
3	4.59	0.83	0.6889
4	3.56	-0.2	0.04
5	3.55	-0.21	0.0441
6	3.71	-0.05	0.0025
7	3.65	-0.11	0.0121
8	3.8	0.04	0.0016
9	3.75	-0.01	1E-04
10	3.56	-0.2	0.04
11	3.57	-0.19	0.0361
12	3.59	-0.17	0.0289
13	3.35	-0.41	0.1681
14	4.19	0.43	0.1849
15	4.15	0.39	0.1521
16	3.86	0.1	0.01
17	3.63	-0.13	0.0169
18	3.73	-0.03	0.0009
19	3.81	0.05	0.0025
20	3.77	0.01	0.0001
total of price per gallon	75.2
A-Average price in dollars = total of price per gallon in dollar/number in sample =75.2/20	3.8
sum of square of (price per dollar-average price per dollar)			1.4596
B-standard deviation = root of sum of square(price per dollar-average price per dollar)/n	√1.4596/20		0.3
C-	Average price is more than the national average	cost of living in San fransico is more it would be for cities