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Author Question: A sample of size 12 is taken from a population that is symmetrical and mounded. A sample mean of ... (Read 50 times)

NguyenJ

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on: Jul 24, 2018
A sample of size 12 is taken from a population that is symmetrical and mounded. A sample mean of 16.2 is obtained and used to construct a 90 confidence interval for the population mean with an unknown . What is the value of the appropriate confidence coefficient?
  1.1.80
  2.1.65
  3.1.28
  4.1.36

Question 2

The t-distribution is more appropriate than the
   z-distribution when the ________ is unknown. The unknown parameter will than be estimated with the ________.


  1. sample size, sample mean
  2. population standard deviation, sample standard deviation
  3. df, population mean
  4. point estimate, sample mean


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Amiracle

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

1

Answer to Question 2

2


NguyenJ

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Reply 2 on: Jul 24, 2018
Gracias!

bbburns21

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Reply 3 on: Yesterday
Wow, this really help

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