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Brums [2.3K]
2 years ago
13

What is the y- intercept of this quadratic funtions f(x)=-x2+10x-22

Mathematics
1 answer:
Rama09 [41]2 years ago
3 0
Y intercept: when x = 0
Plug in x = 0
F(0) = -0^2 + 10(0) - 22
F(0) = 0 - 22

The y intercept is (0,-22)
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A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120. The sampl
jeka94

Answer:

<h3>The standard error of the mean is <u>15</u></h3>

Step-by-step explanation:

Given that a simple random sample of 64 observations was taken from a large population.

Hence it can be written as n=64

The population standard deviation is 120.

It can be written as \sigma_{\overline{X}}=120

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It can be written as \overline{X}=\mu =320

<h3>To find the standard error of the mean :</h3>

The formula for the standard error of the mean is given by

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Now substitute the values in the formula we get

\sigma_{\overline{X}}=\frac{120}{\sqrt{64}}

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