A 90 confidence interval for the mean percentage of airline ...

[khang]

A 90 confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (2.5, 6.4). What is the point estimator of the mean percentage of reservations that are canceled on the day of the flight?
 
  A) 3.9 B) 1.95 C) 4.45 D) 3.20

Question 2

The diameters of ball bearings produced in a manufacturing process can be described using a uniform distribution over the interval 8.5 to 10.5 millimeters. Any ball bearing with a diameter of over 10.25 millimeters or under 8.75 millimeters is considered defective. What is the probability that a randomly selected ball bearing is defective?
 
  A) .50 B) .25 C) .75 D) 0

[hanadaa]

Answer to Question 1

C

Answer to Question 2

B

[khang]

Excellent

[cassie_ragen]

Great answer, keep it coming