High school students from grades 9 10 and 11 12

Asked by maham237 @ 13/01/2021 in Mathematics viewed by 408 People

High school students from grades 9–10 and 11–12 were asked to choose the kind of band to have play at a school dance: rap, rock, or country.
Their choices were as follows:
Grades 9–10—Rap: 40; Rock: 30; Country: 55
Grades 11–12—Rap: 60; Rock: 25; Country: 35

Find a correct two-way frequency table for the data

Answered by maham237 @ 13/01/2021

The correct two-way frequency table for the date will look like this:

RAP ROCK COUNTRY TOTAL
Grades 9-10 40 30 55 125
Grades 11-12 60 25 35 120
TOTAL 100 55 90 245

The sum of the row total is equal to the sum of the column total
125 + 120 = 100 + 55 + 90
245 = 245

Brad is testing whether school is more enjoyable when students are making high grades. he asked 110 students if they enjoyed school and whether their gpa was above or below 3.5. he found that 38 of the 45 students with a gpa above 3.5 reported that they enjoyed school, and 7 of the 65 students with a gpa below 3.5 reported that they enjoyed school. what is the probability that a student with a gpa below 3.5 does not enjoy school?

Asked by maham237 @ 13/01/2021 in Mathematics viewed by 620 persons

High school students from grades 9 10 and 11 12

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