The mean number of hours of study time per week for a sample of 122 high-school students is 30. If the margin of error for the population mean with a 95% confidence interval is 2.2, construct a 95% confidence interval for the mean number of hours of study time per week for all high-school students.

Answer this question only if you know the 30 points and

High schoolmathematics 5 points keith is the leading goal scorer for a team in an ice hockey league. last season, he scored 42 goals in 82 games. assuming he scores goals at a constant rate, what is the slope of the line that represents this relationship if the number of games is along the x-axis and the number of goals is along the y-axis?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0