# In order to use the formula x n to calculate the

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5.In order to use the formulanto calculate the standard deviation of the samplingdistribution of the sample mean, which of the following conditions must be met?I.30nII.The population’s distribution is approximately Normal.III. The sample size is less than 10% of the population size.X(a) I only(b) II only(c) III only(d) III andeitherI or II(e) All three conditions must be met.
6.The central limit theorem refers to which of the following characteristic of the samplingdistribution of the sample mean?.
7.A simple random sample of 1000 Americans found that 62% were satisfied with the serviceprovided by the dealer from which they bought their car.A simple random sample of 1000Canadians found that 59% were satisfied with the service provided by the dealer from whichthey bought their car.The sampling variability associated with these statistics is
© 2011 BFW PublishersThe Practice of Statistics, 4/e- Chapter 7323

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