4. Suppose you are given the following table showing the relationship between church attendance and class standing at a certain university. Class Standing Junior Church Attendance Total Regular Attenders Irregular Attenders Total Freshman| Sophomore 385 125 Senior 159 297 158 999 184 94 391 271 674 510 342 430 1674 a. What is the percentage of regular attenders in the total sample? b. What is the ratio of freshmen to seniors? c. Among regular attenders, what is the ratio of underclassmen (freshmen – sophomores) to upperclassmen?

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