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A teacher was interested in knowing the amount of physical activity

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A teacher was interested in knowing the amount of physical
activity that his students were engaged in daily. He randomly sampled six students in his class and recorded the number of minutes that they exercised in the past day. The numbers were 30mins, 40 mins, 60 mins, 80 mins, 20 mins, and 85 mins. What’s the sample standard deviation? (show work)

– A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled six students in his class and recorded the number of minutes that they exercised in the past day. The numbers were 30mins, 40 mins, 60 mins, 80 mins, 20 mins, and 85 mins. This teacher posed a null hypothesis that the average amount of physical activity of his students should be 60 mins per day. What is the absolute value of calculated t that we use for testing the null hypothesis? (show work)

 
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