Information about standard deviation of distribution

Reference no: EM13100458

A marketing poll revealed that 45% of Americans say they that they have dinner regularly as a family. You randomly choose 10 American families and ask if they regularly have dinner together as a family.

1. Does this situation meet the binomial requirements? Why or why not? Address the four characteristics in the Key Points.

2. What is the random variable in this problem? i.e., what does X represent and what values can it have?)

3. What is the probability that exactly 4 have regular family dinner?

4. What is the probability that 5 or fewer have regular family dinner?

5. What is the probability that at least 2 have regular family dinner?

6. What is the probability that at most 5 have regular family dinner?

7. What is the mean number of adults out of a sample of 10 that you would expect to have regular family dinner? What is the standard deviation of the distribution?

Reference no: EM13100458

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