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The mean (μ) is 9.12 ounces, and the standard deviation (σ) is 0.05 ounces. Show more…
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The weights of 9-ounce bags of a particular brand of potato chips can be modeled by a normal distribution with mean μ = 9.12 ounces and standard deviation σ =0.05 ounce. Let X = the weight ( in ounces) of a randomly selected bag. Use the 68-95-99.7 rule to approximate: The probability that the bag weighs between 8.97 and 9.17 ounces.
Sri K.
The distribution of weights of 9 -ounce bags of a particular brand of potato chips is approximately Normal with mean $\mu=9.12$ ounces and standard deviation $\sigma=0.05$ ounce. Draw an accurate sketch of the distribution of potato chip bag weights. Be sure to label the mean, as well as the points one, two, and three standard deviations away from the mean on the horizontal axis.
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Crossett Trucking Company claims that the mean weight of its delivery trucks when they are fully loaded is 6,000 pounds and the standard deviation is 150 pounds. Assume that the population follows the normal distribution. Forty trucks are randomly selected and weighed. Within what limits will $95 \%$ of the sample means occur?
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