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Author Question: The diameter of ball bearings produced in a manufacturing process can be explained using a uniform ... (Read 66 times)

jayhills49

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on: Jul 24, 2018
The diameter of ball bearings produced in a manufacturing process can be explained using a uniform distribution over the interval 7.5 to 9.5 millimeters.
 
  What is the probability that a randomly selected ball
  bearing has a diameter greater than 8.6 millimeters?
  A) 0.45 B) 0.9053 C) 4 D) 0.5059

Question 2

A study was designed to investigate the effects of two variables - (1 ) a students level of mathematical anxiety and (2 ) teaching method - on a students achievement in a mathematics course.
 
  Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 480 with a standard deviation of 20 on a standardized test. Assuming no information concerning the shape of the distribution is known, what percentage of the students scored between 440 and 520? A) at least 75 B) approximately 95
  C) at least 88.9 D) approximately 68


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Jody Vaughn

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

A

Answer to Question 2

A


jayhills49

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Reply 2 on: Jul 24, 2018
:D TYSM

amynguyen1221

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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