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Author Question: Scores of high school students on a national mathematics exam in Egypt were normally distributed ... (Read 131 times)

cagreen833

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on: Jun 24, 2018
Scores of high school students on a national mathematics exam in Egypt were normally distributed with a mean of 86 and a standard deviation of 4. A) What is the probability that a randomly selected student will have a score of 80 or higher? B) If there were 97,680 students with scores higher than 91, how many students took the test? ___________________ _ (Remove all commas from your answer before submitting).
 Fill in the blank(s) with correct word

Question 2

Which of the following statements are correct?
 a. A confidence level expresses the degree of certainty that an interval will include the actual value of the population parameter.
  b. A confidence level expresses the degree of certainty that a point estimate will include the actual value of the population parameter.
  c. A confidence level expresses the degree of certainty that an interval will include the actual value of the sample statistic.
  d. A confidence level expresses the degree of certainty that a point estimate will include the actual value of the sample statistic.
  e. None of these statements is correct.


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mfedorka

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

0.9332; 925000

Answer to Question 2

A


cagreen833

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Reply 2 on: Jun 24, 2018
Excellent

shewald78

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Reply 3 on: Yesterday
Gracias!

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