A random sample of 175 students was selected from a large high school. They were each asked their current grade level and whether they have a driver's license. The responses are displayed in the table. Grade Level 9th 10th 11th 12th Yes 1 21 48 Driver's License? No 28 42 20 10 The principal would like to know if these data provide convincing evidence of a relationship between grade level and having a driver's license in the population of all students in her school. The random and 10% conditions are met, and this table of expected counts shows that all expected counts are at least 5. Grade Level 9th 10th 11th 12th 12.43 16.57 24.86 33.14 Yes 20.14 17.57 Driver's License? No 26.86 23.43 The value of the chi-square test statistic is x? = 77.18. What are the degrees of freedom and P-value of this %3D test?

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