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Author Question: Ten percent of the items produced by a machine are defective. A random sample of 100 items is ... (Read 144 times)

sdfghj

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on: Jun 24, 2018
Ten percent of the items produced by a machine are defective. A random sample of 100 items is selected and checked for defects.
 a. Determine the standard error of the proportion.
  b. What is the probability that the sample will contain more than 2.5 defective units?
  c. What is the probability that the sample will contain more than 13 defective units?

Question 2

Assume z is a standard normal random variable. Then P(1.05  z  2.13) equals _____.
 a. .8365
  b. .1303
  c. .4834
  d. None of the answers is correct.


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trog

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

a. .03
b. .9938
c. .1587

Answer to Question 2

b


sdfghj

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

xiaomengxian

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Reply 3 on: Yesterday
Excellent

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