Determine the sample standard deviation length of eruption

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Reference no: EM131125408

The Empirical Rule The following data represent the length of eruption for a random sample of eruptions at the Old Faithful geyser in Calistoga, California.

108	108	99	105	103	103	94
102	99	106	90	104	110	110
103	109	109	111	101	101
110	102	105	110	106	104
104	100	103	102	120	90
113	116	95	105	103	101
100	101	107	110	92	108

(a) Determine the sample standard deviation length of eruption.

Express your answer rounded to the nearest whole number.

(b) On the basis of the histogram drawn in Section 3.1, Problem 28, comment on the appropriateness of using the Empirical Rule to make any general statements about the length of eruptions.

(d) Determine the actual percentage of eruptions that last between 92 and 116 seconds, inclusive.

(e) Use the Empirical Rule to determine the percentage of eruptions that last less than 98 seconds.

(f) Determine the actual percentage of eruptions that last less than 98 seconds.

Reference no: EM131125408

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