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Author Question: It is decided that tomorrow a sample of 20 bricks will be taken. Without doing the calculations, ... (Read 46 times)

xclash

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on: Jun 24, 2018
It is decided that tomorrow a sample of 20 bricks will be taken.
 
  Without doing the calculations, explain whether a correctly calculated 95 confidence interval for the mean weight of tomorrow's output would be wider than, narrower than, or the same width as that of a 99 confidence interval for the mean weight of all bricks produced this day.

Question 2

In a goodness-of-fit-test, suppose that the value of the test statistic is 13.08 and degrees of freedom = 6. At the 5 significance level, the null hypothesis is:
 
  A) rejected, and p-value for the test is smaller than 0.05.
  B) not rejected, and p-value for the test is greater than 0.05.
  C) rejected, and p-value for the test is greater than 0.05.
  D) not rejected, and p-value for the test is smaller than 0.05.


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leeeep

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

A correctly calculated 95 confidence interval for the population mean would be narrower than that of a 99 confidence interval for the mean weight of all bricks produced this day due to the smaller standard error.

Answer to Question 2

A


xclash

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Reply 2 on: Jun 24, 2018
:D TYSM

peter

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Reply 3 on: Yesterday
Excellent

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