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Author Question: The complement of P(A B) is _____. a. P(Ac B) b. P(A Bc) c. P(B A) d. P(A ... (Read 34 times)

genevieve1028

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on: Jun 24, 2018
The complement of P(A  B) is _____.
 a. P(Ac  B)
  b. P(A  Bc)
  c. P(B  A)
  d. P(A  B)

Question 2

Two hundred students are enrolled in an Economics class. After the first examination, a random sample of 6 papers was selected. The scores were 65, 75, 89, 71, 70, and 80.
 a. Determine the standard error of the mean.
  b. What assumption must be made before we can determine an interval for the mean score of all the students in the class? Explain why.
  c. Assume the assumption of Part b is met. Provide a 95 confidence interval for the mean score of all the students in the class.


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fdliggud

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

a

Answer to Question 2

a. 3.474
b. Since n is small and  is estimated from s, we must assume the distribution of all the scores is normal.
c. 66.07 to 83.93 (rounded)


genevieve1028

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

sailorcrescent

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Reply 3 on: Yesterday
Excellent

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