Planners in the city of Middletown wanted to estimate the mean number of people per household from a sample of 250 households out of 3500 in total, and the average household size is found to be 2.5 and the standard deviation is 0.2. From the 1990 Census of Population, Middletown officials have learned that the average number of people per household in the U.S. is 2.61. Is Middletown household size typical of this national figure? Assuming the confidence level is 95%.

MATLAB: An Introduction with Applications
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Planners in the city of Middletown wanted to estimate the mean number of people per household from a sample of 250 households out of 3500 in total, and the average household size is found to be 2.5 and the standard deviation is 0.2. From the 1990 Census of Population, Middletown officials have learned that the average number of people per household in the U.S. is 2.61. Is Middletown household size typical of this national figure? Assuming the confidence level is 95%. 

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