Mathematics, 05.05.2021 03:20, sadiesnider9

In a kindergarden class of 19 students, 100 addition problems can be completed in a mean time of 6 minutes. The standard deviation is 1 minute. How many students will take between 3 and 9 minutes?

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In a kindergarden class of 19 students, 100 addition problems can be completed in a mean time of 6 m...