7. Groups of people aged 15-65 are randomly selected and arranged in groups of six. In...

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7. Groups of people aged 15-65 are randomly selected and arranged in groups of six. In...

7. Groups of people aged 15-65 are randomly selected and arranged in groups of six. In the accompanying table, the random variable x is the number in the group who say that their family and/or partner contribute most to their happiness (based on a survey).

x   P(x)
0   0+
1   0.013
2   0.036
3   0.186
4   0.176
5   0.205
6   0.384

If the table is a probability distribution, what is its standard deviation? Select the correct choice below and fill in any answer boxes within your choice.

A.Its standard deviation is ___

(Round to one decimal place as needed.)

B.The table is not a probability distribution.

math Statistics-And-Probability

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Answer 1

Answer #1

mean = 4.

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Answer 2

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