Corn flakes come in a box that says it holds an average weight of68 ounces of cereal with a standard deviation of 0.4 ounces. Suppose thatthe manufacturer packages 30000 boxes with weights that have a normaldistribution. How many boxes weigh between 67.6 and 68.4 ounces?

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A farmer grows a particular type of apple which have normally distributed weights with a mean of 150 g and a standard deviation of 20 g. What percentage of apples weigh more than 180 grams? Give your answer as a percentage to two decimal places, but do not write the percent sign (for example, if the answer was 30.04%, you would enter 30.04)
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man who is 63 inches tall. (to 4 decimal places)
A certain grade egg must weigh at least 2.0 Oz. If the weights of eggs are normally distributed with a mean of 1.5oz. And a standard deviation of 0.4oz, approximately how many eggs would you expect to weigh more than 2oz?
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
Suppose that the heights of adult women in the United States are normally distributed with a mean of 64.5 inches and a standard deviation of 2.2 inches. Lena is taller than 90% of the population of U.S. women. How tall (in inches) is Lena? Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 63.4 inches tall. (to 2 decimal places)
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Corn flakes come in a box that says it holds an average weight of 68 ounces of cereal with a standard deviation of 0.4 ounces. Suppose that the manufacturer packages 30000 boxes with weights that have a normal dictribuutic nigh h