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3 years ago

What is n? The answer format is n=

Mathematics

1 answer:

vladimir1956 [14]3 years ago

5 0

I hope this helps. If you don’t understand it I will explain it again

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A soft drink manufacturer wishes to know how many soft drinks adults drink each week. They want to construct a 85% confidence in

Aleks04 [339]

Answer:

The minimum sample size is 1867 observations.

Step-by-step explanation:

We need to construct an 85% confidence interval that has an error less than 0.06. It means that the difference between the upper limit (UL) and the lower limit (LL) has to be 0.06.

$UL-LL= e =0.06$

$UL-LL= e =0.06\\X+z*s/\sqrt{n} -(X-z*s/\sqrt{n}) = e\\2*z*s/\sqrt{n}=e\\$

The only variable we can adjust is the number of observations (n)

$2*z*s/\sqrt{n}=e\\\\\sqrt{n}=\frac{2*z*s}{e}\\\\ n=(\frac{2*z*s}{e})^{2}=\frac{4*z^{2} *s^{2} }{e^{2} }$

For a 85% confidence interval, the z-score is 1.440.

The estimated variance (s^2) is 0.81.

The error e is 0.06.

$n= 4*(1.440)^{2} *0.81/(0.06)^{2} \\\n=4*2.0736*0.81/0.0036= 6.7184 / 0.0036 = 1866.24$

The sample has to be at least of 1867 observations.

7 0

3 years ago

How to figure it out

harkovskaia [24]

Have
.5x+.10y+.20z=380

8 0

3 years ago

Can someone help me ?

alexira [117]

Answer:

Can you please show the questions? It's way more easier

6 0

3 years ago

Simplify <br>28y=12x+84<br>I don't know this

irina1246 [14]

Divide everything by 4 getting:
7y=3x+21
then get all of the variables on one side by subtracting 3x:
7y-3x=21

7 0

3 years ago

Help! Click the photo

Mamont248 [21]

Answer:

i say 10 trees, i think its trying to trick you in thinking each row is multiplied by 4 which equal 4, so 4-6 = -2. so what i did was multiply 4 by 4 which gives me 16 -6 equals 10.

Step-by-step explanation:hope this helped if not u tell me so i can work on this topic.

5 0

2 years ago