4. In a test designed to assess small motor coordination, kindergarten pupils are timed on their performance of a specific task. is known that the time required to complete the task has an approximate bell-shaped distribution with mean 36 seconds and a standard deviation (s.d.) of 6 seconds. How long should the test administrator allow for the performance of the task, if it is desired that approximately 97.5% of the kindergarten pupils complete the task? 48 42 24

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