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 7th grade 27 45 8th grade total 49 33

Explanation:

Step1: Find 7th grade Less

Total for 7th grade is 45, More is 27. So Less = Total - More = 45 - 27 = 18.

Step2: Find 8th grade More

Total More is 49, 7th grade More is 27. So 8th grade More = 49 - 27 = 22.

Step3: Find 8th grade Less

Total Less is 33, 7th grade Less is 18. So 8th grade Less = 33 - 18 = 15.

Step4: Find 8th grade Total

8th grade Total = 8th grade More + 8th grade Less = 22 + 15 = 37.

Step5: Find Grand Total

Grand Total = Total More + Total Less = 49 + 33 = 82 (or 45 + 37 = 82).

Answer:

	More	Less	Total
8th grade	22	15	37
Total	49	33	82

Missing values: 7th grade Less = 18, 8th grade More = 22, 8th grade Less = 15, 8th grade Total = 37, Grand Total = 82.