(All Steps) A sixth-grade geography teacher in a city school system gave a standardized geography test to a sample of 23 students. The mean was x̄=68.3
Question: A sixth-grade geography teacher in a city school system gave a standardized geography test to a sample of 23 students. The mean was \(\bar{x}=68.3\) with a standard deviation \(s=12.2\). Using a 05 level of significance, can the teacher conclude that the city's sixth-graders performance differs from the natural mean of 72?
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![[See Steps] A medical doctor wanted to](/images/solutions/MC-solution-library-46489.jpg "[See Steps] A medical doctor wanted to estimate the mean length")
[See Steps] A medical doctor wanted to estimate the mean length
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