Suppose you perform a study about the hours of sleep that college students get. you know that for all people, the average is about 7 hours. you randomly select 40 college students and survey them on their sleep habits. from this sample, the mean number of hours of sleep is found to be 6.2 hours with a standard deviation of 0.86 hours. you want to construct a 99% confidence interval for the mean nightly hours of sleep for all college students.

(a) what is the point estimate for the mean nightly hours of sleep for all college students?
hours

Anyone know? is appreciated! will mark brainliest if correct!

Nine people are going to share a 128-ounces bottle of soda. how many ounces will each person get drink? choose the correct equation and answer for this situation

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?