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Question 941:

Problem 3: A group of college students were surveyed to learn how many times they had visited a dentist in the previous year. The probability distribution for Y, the number of visits, is given by the following table

Y (No. visits) Probability
0 0.15
1 0.50
2 0.35
Total 1.000

1. what is the mean of Y?

2. what is the variance and standard deviation of Y?

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