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Author Question: From a population of 200 elements, the standard deviation is known to be 14 . A sample of 49 ... (Read 107 times)

newyorker26

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on: Jun 24, 2018
From a population of 200 elements, the standard deviation is known to be 14 . A sample of 49 elements is selected. It is determined that the sample mean is 56 . The standard error of the mean is _____.
 a. 3
  b. 2
  c. greater than 2
  d. less than 2

Question 2

The student body of a large university consists of 30 Business majors. A random sample of 20 students is selected.
 a. Define the random variable in words for this experiment.
  b. What is the probability that among the students in the sample at least 10 are Business majors?
  c. What is the probability that at least 16 are not Business majors?
  d. What is the probability that exactly 10 are Business majors?
  e. What is the probability that exactly 12 are not Business majors?


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bdobbins

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

d

Answer to Question 2

a. x = the number of students out of 20 who are Business majors or
y = the number of students out of 20 who are not Business majors
b. .0480
c. .2375
d. .0308
e. .1144


newyorker26

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Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

Jossy

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

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