A random sample of n measurements was selected from a population with unknown mean μ and standard deviation o=15 for each of the situations in parts a through d. Calculate a 99% confidence interval for µ for each of these situations. a. n = 60, x=28 b. n = 200, x= 108 c. n = 80, x= 14 d. n=80, x= 4.09 e. Is the assumption that the underlying population of measurements is normally distributed necessary to ensure the validity of the confidence intervals in parts a through d? Explain. a. (Round to two decimal places as needed)

Kindly answer the questions in the attached photos.

How many minutes are in 130 seconds? Your answer will have both minutes and seconds. Show your set-up.

Please provide me with the answer and solutions.

A 3rd year student has 75 credits and a cumulative GPA of 2.88. This semester she is registered for 15 credits and hopes to raise his cumulative GPA to 3.00 and make the Dean’s List.   Is it possible? What semester GPA will she need to accomplish that? Show your calculations or post a screenshot from your online GPA grade calculator.

I need help with 21

Please Finish Parts D and E

A highway has an optional toll lane that drivers may take to reduce the time they spend driving. Drivers pay a small fee to enter the toll lane ($0.25)($0.25). Then, once they leave the toll lane, they pay a fee based on the number of miles they have traveled on the toll lane. Assume that the driver may leave the lane after any whole number of miles and pays for exactly that number, without rounding up. Note that there is a linear relationship between the number of miles a vehicle has traveled and the price of the toll. Number of miles traveled on toll lane Toll ($) 0 0.25 1 1.00 2 1.75 5 4.00 10 7.75 B. Each day, Susan has to pay a toll of $10.75$10.75 when she uses the toll lane to get to school. How many miles does Susan travel on the toll lane to get to school? C. John started a carpool with his coworkers to save money. He and his three passengers split the cost of the toll. If each person pays about $2.13$2.13, which includes their contribution to the toll lane…

Can you recheck and write the a and b portions.

can you complete the follow up question i posted