The data below are the final exam scores of 10 randomly sele…

The data below are the final exam scores of 10 randomly selected calculus students and the number of hours they slept the night before the exam. Calculate the linear correlation coefficient and decide if there is significant linear correlation. Round to three decimal places. Hours, x 8 10 7 13 7 9 9 10 11 8 Scores, y 72 87 67 95 73 85 92 97 97 78

In a previous year, 54% of females aged 15 and older lived a…

In a previous year, 54% of females aged 15 and older lived alone. A sociologist tests whether this percentage is different today by conducting a random sample of 700 females aged 15 and older and finds that 388 are living alone. Is there sufficient evidence at the