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Author Question: A 90 confidence interval for the mean percentage of airline reservations being canceled on the day ... (Read 105 times)

khang

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on: Jun 24, 2018
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


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hanadaa

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Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

B


khang

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Reply 2 on: Jun 24, 2018
Wow, this really help

xiaomengxian

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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