According to the ACT Profile Report-National, the ACT composite scores are normally distributed with µ=21.0 and σ=5.4. Many charter schools receive funding from the state government without providing accountability measures as required by the public schools. A sample of 36 high school seniors is randomly selected from charter schools. Their average ACT composite score is 19.8. Is the average ACT composite score of seniors from charter schools lower than 21.0 assuming α=0.05?

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According to the ACT Profile Report-National, the ACT composite scores are normally distributed with µ=21.0 and σ=5.4. Many charter schools receive funding from the state government without providing accountability measures as required by the public schools. A sample of 36 high school seniors is randomly selected from charter schools. Their average ACT composite score is 19.8. Is the average ACT composite score of seniors from charter schools lower than 21.0 assuming α=0.05? 

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