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ladessa [460]
2 years ago
15

Please help!!!!!!!!!!!!!!!

Mathematics
1 answer:
babymother [125]2 years ago
6 0

Answer: um

Step-by-step explanation:

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Is -(x+7)^2+4 a quadratic function?
Oliga [24]
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mestny [16]

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false

Step-by-step explanation:

4 0
3 years ago
We wish to construct a 90% confidence interval on the mean of a population known to be normally distributed based on a sample of
sergiy2304 [10]

Answer:

Margin of error = 0.773

Step-by-step explanation:

We are given the following information in the question.

Sample size, n = 20

Sample mean = 8

Sample standard deviation = 2

90% Confidence interval

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 19 and}~\alpha_{0.10} = \pm 1.729  

Margin of error:

t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

1.729(\frac{2}{\sqrt{20}} ) = 0.773  

7 0
3 years ago
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