The liquid volume packaged in a bottle of A-brand orange juice follows a normal distribution, with a mean=u ml and stand

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The Liquid Volume Packaged In A Bottle Of A Brand Orange Juice Follows A Normal Distribution With A Mean U Ml And Stand 1 (19.13 KiB) Viewed 36 times

The liquid volume packaged in a bottle of A-brand orange juice follows a normal distribution, with a mean=u ml and standard deviation of 5 ml. We take a sample of bottles and measure their volumes. How many bottles do we have to sample so that we are 90% confident that the measured mean is within + 0.5 ml of the true mean? Round the result to the nearest integer. Note that from the 2-distribution table, we know: P(Z<= -1.645) = 5% P(Z<= -1.96) = 2.5% P(Z<= -1.28) = 10%