Use the probability distribution to complete parts (a) and (b) below. The number of school-related extracurricular...

 

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Use the probability distribution to complete parts (a) and (b) below. The number of school-related extracurricular activities per student Activities 0 1 2 3 4 7 Probability 0.058 0.123 0.163 0.179 0.211 0.129 0.084 0.053 (a) Find the mean, variance, and standard deviation of the probability distribution. The mean is (Round to one decimal place as needed.) The variance is. (Round to one decimal place as needed.) The standard deviation is. (Round to one decimal place as needed.) (b) Interpret the results. The mean is , so the average student is involved in The standard deviation is , so the typical number of activities per student (Round to one decimal place as needed.) Use the probability distribution to complete parts (a) and (b) below. The number of school-related extracurricular activities per student Activities 0 1 2 3 4 7 Probability 0.058 0.123 0.163 0.179 0.211 0.129 0.084 0.053 (a) Find the mean, variance, and standard deviation of the probability distribution. The mean is (Round to one decimal place as needed.) The variance is. (Round to one decimal place as needed.) The standard deviation is. (Round to one decimal place as needed.) (b) Interpret the results. The mean is , so the average student is involved in The standard deviation is , so the typical number of activities per student (Round to one decimal place as needed.)