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The average movie ticket in 2010 costs $7.89. A random sample of n=15 movie tickets from the suburbs of a large U. S. city indicated

The average movie ticket in 2010 costs $7.89. A random sample of n=15 movie tickets from the suburbs of a large U. S. city indicated that the mean cost was x= $11.09 with a standard deviation of s=$4.86 . At the =0.01level of significance, can it be concluded that that the mean is greater than the national average?

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