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yulyashka [42]
3 years ago
8

PLS HELP WILL GIVE BRAINLIEST AND POINTS PLS HELP

Mathematics
2 answers:
padilas [110]3 years ago
8 0
The answer is definitely c
mestny [16]3 years ago
4 0

Answer:

it is c

Step-by-step explanation:

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A public health official is planning for the supplyof influenza vaccine needed for the upcoming flu season. She wants to estimat
Marizza181 [45]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25  

And rounded up we have that n=421

Step-by-step explanation:

We know that the sample proportion have the following distribution:

\hat p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=-1.64, z_{1-\alpha/2}=1.64

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.04 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

We assume that a prior estimation for p would be \hat p =0.5 since we don't have any other info provided. And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25  

And rounded up we have that n=421

5 0
3 years ago
Will give brainliest give the answer and steps
tester [92]

Answer:B=8

Step-by-step explanation:

3 0
3 years ago
What is the slope of the line through ( 1 , − 1 ) and( 5 , − 7 )
Semenov [28]
M= y2-y1     -7- -1
      -------                 =   _-6_   = -3/2 
     x2-x1      5 -1            4 
3 0
3 years ago
Read 2 more answers
Someone help on this one please
vova2212 [387]

Answer:

B. Multiply each x-value in the table by -1.

Step-by-step explanation:

A point reflected across the y-axis has the same y-value, but the x-value is replaced by its opposite. For example, (-2, -31) reflected across the y-axis becomes (2, 31).

The appropriate choice is ...

... B. Multiply each x-value in the table by -1.

_____

<em>Comment on the graph</em>

The purple points are the ones in the given table. The red points are the same with their x-coordinate multiplied by -1. You can see that they are the reflection of the purple points across the y-axis. The lines joining the points are to help you see the points and which data set they are in.

7 0
3 years ago
What is 86.92 in pi terms
trasher [3.6K]
Assume that pi is approx. 3.14.  Then 86.92 = approx. 27 2/3   times   pi, or

86.92 is approx. equal to 83pi/3.
6 0
3 years ago
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