# Question

A book publisher monitors the size of shipments of its textbooks to university bookstores. For a sample of texts used at various schools, the 95% confidence interval for the size of the shipment was 250 ± 45 books. Which, if any, of the following interpretations of this interval is/are correct?
(a) All shipments are between 205 and 295 books.
(b) 95% of shipments are between 160 and 340 books.
(c) The procedure that produced this interval generates ranges that hold the population mean for 95% of samples.
(d) If we get another sample, then we can be 95% sure that the mean of this second sample is between 160 and 340.
(e) We can be 95% confident that the range 160 to 340 holds the population mean.

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