eed Help? 6.1.009 At Burnt Mesa Pueblo, arc excavations gave a mean of (year) 12

Question

eed Help? 6.1.009 At Burnt Mesa Pueblo, arc excavations gave a mean of (year) 1236 with a standard deviation of 30 years. The distribution of dates was more or less mound-shaped and symmetrical about the mean. Use the studies g dating in an effort to determine when people lived in the pueblo. Wood from several rule to estimate the following. (a) a range of years centered about the mean in which about 68% of the data (tree-ring dates) will be found A.D (b) a range of years centered about the mean in which about 95% of the data (tree-ring dates) will be found between A.D. (c) a range of years centered about the mean in which almost all the data (tree-ring dates) wilbe found and AD Need Help? 0.4 ounce. Examine the figure below and answer the following questions.

Explanation / Answer

As per the empirical rule,

Around 68% of the data is within x+/-one sd from the mean

Around 95% of the data is within x+/-two sd from the mean

Around 99.7% of the data is within x+/-three sd from the mean

a)

(1236-30) to (1236+30)

1206 to 1266

b)

(1236-60) to (1236+60)

1176 to 1296

c)

(1236-90) to (1236+90)

1146 to 1326

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