A Lyman Electronic Digital Caliper was used to accurately measure the lengths of 40 Triton Quik-Shok 380 ACP 90 grain cartridges (bullets). The results (in millimeters) are listed below. The cartridges are supposed to have a mean length of 0.950 mm and they must be between 0.945 mm long and 0.955 mm, other-wise they could be dangerous when fired. Construct a 90% confidence interval estimate of the mean length, then interpret the results.

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0.951 0.954 0.954 0.953 0.953 0.953 0.952 0.955 0951 0.949 0.950 0.950 0.954 0.950 0.948 0.948 0.945 0.947 0.950 0.954 0.951 0.951 0.952 0.943 0.952 0.952 0.949 0.946 0.949 0.949 0.953 0.953 0.953 0.950 0.949 0.950 0.950 0.949 0.950 0.951