Answer:
ExStudents who are physically active tend to have better grades, school attendance, cognitive performance (e.g., memory), and classroom behaviors (e.g., on-task behavior). Higher physical activity and physical fitness levels are associated with improved cognitive performance (e.g., concentration, memory) among studentsplanation:
at city high school the sophomore class has 60 students and the freshman class the junior class has 50 fewer students than twice the students in the freshman class the senior class is three times as large as the freshman class if there are a total of 1424 students at city high school how many students are in the freshman class
Answer:
Explanation:
Freshman: x students
Sophomore: 60 students
Junior: 2x - 50 students
Senior: 3x students
Total: 1424 students
Add all these together, it will be equal to 1424.
x + 60 + (2x - 50) + 3x = 1424
x + 60 + 2x - 50 + 3x = 1424
x + 2x + 3x + 60 - 50 = 1424
6x + 10 = 1424
6x + 10 - 10 = 1424 - 10
6x = 1414
[tex]\frac{6x}{6} = \frac{1414}{6}[/tex]
x = 235.67
The freshman class has either 235 or 236. 236 would make sense if we round it off.
But if freshman class has 236 students, the total would be 1426. If it has 235 students, the total would be 1420.
It's kinda weird. I don't know if I miss anything.
A researcher conducts a repeated-measures study comparing two treatment conditions (before and after) with a sample of n = 20 participants and obtains a t statistic of t = 4.21. What is the correct decision for a one-tailed test
Answer:
Reject the null hypothesis with a one-tailed test but fail to reject with two tails
Explanation:
Kể về một kỉ niệm của một người thân trong gia đình Ngữ Văn 9
.............what-??????