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Ira Lisetskai [31]
3 years ago
7

Can I get some help on this please? This is part 1 I will post part 2 later.

Mathematics
1 answer:
Darya [45]3 years ago
3 0

Answer:

-2/3 (fixed it)

Step-by-step explanation:

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Which of the following statements are not true in developing a confidence interval for the population mean?
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Answer:

b) The width of the confidence interval becomes narrower when the sample mean increases.

Step-by-step explanation:

The confidence interval can be calculated as:

\bar{x} \pm \text{Test Statistic}\displaystyle\frac{\sigma}{\sqrt{n}}

a) The width of the confidence interval becomes wider as the confidence level increases.

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The above statement is false. As the sample mean increases the width of the confidence interval increases.

c) The width of the confidence interval becomes narrower when the sample size n increases.

The above statement is true as the sample size increases the standard error decreases and the confidence interval become narrower.

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