Question

a survey asked a random sample of students if they estimated they spent more or less than an hour a day on social media. results are shown in the table below, but some values are missing. fill in the missing values. social media more less total 7th grade 30 8th grade 25 total 37 82

Explanation:

Step1: Find total "More"

Total "More" = Total - Total "Less"
Total "More" = \(82 - 37=45\)

Step2: Find 7th grade "Less"

7th grade "Less" = Total "Less" - 8th grade "Less"
7th grade "Less" = \(37 - 25 = 12\)

Step3: Find 7th grade "More"

7th grade "More" = 7th grade Total - 7th grade "Less"
7th grade "More" = \(30 - 12=18\)

Step4: Find 8th grade Total

8th grade Total = Total - 7th grade Total
8th grade Total = \(82 - 30 = 52\)

Step5: Find 8th grade "More"

8th grade "More" = Total "More" - 7th grade "More"
8th grade "More" = \(45 - 18 = 27\)

Answer:

7th grade "More": \(18\), 7th grade "Less": \(12\), 8th grade "More": \(27\), 8th grade Total: \(52\), Total "More": \(45\)