# Question: the thrust of a jet engine was measured under the...

###### Question details

The thrust of a jet engine was measured under the same operating conditions and a sample of data points was collected. The process was repeated during 3 different data collection sessions. The resulting 3sets of data are shown in the provided table.

**d) Compute the pooled mean and standard deviation.
Estimate the true**

**mean based on pooled values at the 95% probability.
List the t -value using 3 decimal points.**

**Please show explain all steps.**

**Thank you!!!!**

KNOWN:

Three data sets, N = 20