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[ADVANCE]

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To study the relationship between the physical fitness of residents in a certain city and their outdoor exercise time, a survey was conducted on the average daily outdoor exercise time of 100 residents in a community in the city. The statistical data is as follows:

| Average daily outdoor exercise time (minutes) | [0,10) | [10,20) | [20,30) | [30,40) | [40,50) | [50,60] |
| --- | --- | --- | --- | --- | --- | --- |
| Total number of people | 10 | 18 | 22 | 25 | 20 | 5 |

It is stipulated that residents with an average daily outdoor exercise time within [0,40) minutes are evaluated as "not meeting the standard for outdoor exercise", and those within [40,60] minutes are evaluated as "meeting the standard for outdoor exercise".

(1) Please fill in the following 2x2 contingency table based on the statistical data in the above table, and according to the independence test of the small probability value α =0.05, can it be considered that gender is related to whether outdoor exercise meets the standard?

| | Does not meet the standard for outdoor exercise | Meets the standard for outdoor exercise | Total |
| --- | --- | --- | --- |
| Male | _____ | _____ | _____ |
| Female | _____ | 10 | 55 |
| Total | _____ | _____ | _____ |

(2) From the residents who "do not meet the standard for outdoor exercise", select 5 residents by stratified sampling by gender, and then randomly select 3 people from these 5 residents to understand the reasons for their lack of outdoor exercise time. Let the number of male residents among the 3 selected be the random variable X, find the distribution and mathematical expectation of X;

(3) Considering the frequency obtained from the above survey as a probability to estimate the situation of the whole city, now randomly select 3 people from all residents of the city, and find the probability that exactly 2 people "meet the standard for outdoor exercise".

Reference formula: χ² = n(ad-bc)² / ((a+b)(c+d)(a+c)(b+d)), where n=a+b+c+d.

Reference data: (Small probability values and corresponding critical values commonly used in χ² independence test)

| α | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
| --- | --- | --- | --- | --- | --- | --- |
| χ_α | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |

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