Compute a 90 tolerance interval on the compressive strength

Consider the strength-of-concrete data

The compressive strength of concrete is being tested by a civil engineer. He tests 12 specimens and obtains the following data.

2216 2237 2249 2204

2225 2301 2281 2263

2318 2255 2275 2295

Compute a 90% tolerance interval on the compressive strength of the concrete that has 90% confidence.

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Compute a 90 tolerance interval on the compressive strength : consider the strength-of-concrete datathe compressive strength of concrete is being tested by a civil engineer. he

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