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	5	6	7
Probability	0.057	0.121	0.163	0.176	0.219	0.128	0.084	0.052

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Part 1

(a) Find the mean, variance, and standard deviation of the probability distribution.

The mean is

enter your response here.

(Round to one decimal place as needed.)