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sukhopar [10]
3 years ago
11

Need help on number 20, please!

Mathematics
1 answer:
dalvyx [7]3 years ago
6 0
Like 65112 idk i need more pointe
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Which of the following statements are not true in developing a confidence interval for the population mean?
frutty [35]

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.

The above statement is true as the confidence level increases the width increases as the absolute value of test statistic increases.

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

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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3 years ago
What is the area of the figure? The figure is not drawn to scale.
lora16 [44]
Top triangle((6X9)/2)=27square 7x9=63 parallelogram 7X9=69 right triangle ((7X6)/2)=21 so 27+63+63+21=174
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3 years ago
The math says expand 5(2-7x) what is the answer
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Step-by-step explanation:

in my opinion

5(2- 7x)

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= 10-35x

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Is 2/5 and 8/20 equivalent
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8 divided by 4 equals 2 and 20 divided by 4 is 5
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