Several educators are starting to create videos for their classes in distance learning. A large school is interested in knowing what the average video length (in minutes) i: among the staff. They calculated a 95% confidence interval after surveying a random sample of professors and get [9.25, 15.37]. Which of the following is the correct interpretation of this interval. We can expect that the mean video length to be between 9.25 and 15.37 minutes. The average video length is going to be 12.31 minutes with a margin of error of about 3.06 minutes. We cannot interpret this interval because we don't know exactly how many professors were surveyed. We are 95% confident that the average video length of the professors surveyed is between 9.25 and 15.37 minutes. We are 95% confident that the mean video length among all educational videos in the school is between 9.25 and 15.37 minutes. O O 0 O O

A researcher investigated whether the temperature of milk, x, can be used to predict the milk's pH content, y. She predicted the pH level of a glass of milk with a temperature of 8.45 degrees to be ŷ= 6.795 a)A 95% confidence interval for the mean pH of all milk with temperature 8.45 degrees is calculated to be (6.76, 6.83). Which of the following is the correct interpretation of this confidence interval? -The mean pH level for all glasses of milk having a temperature of 8.45 degrees is somewhere between 6.76 and 6.83, with 95% confidence. -The pH level for one glass of milk with a temperature of 8.45 degrees is somewhere between 6.76 and 6.83, with 95% confidence. -There is a probability of 0.95 that the mean pH level for this glass of milk with temperature 8.45 degrees is between 6.76 and 6.83. -95% of all glasses of milk with a temperature of 8.45 degrees have a pH level between 6.76 and 6.83.   b)Suppose we have a glass of milk whose temperature is 8.45 degrees. We…