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Tasya [4]
2 years ago
8

Imran made a profit of 20 percent

Mathematics
1 answer:
Ivanshal [37]2 years ago
6 0
He overall had a 10% loss.
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You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past
alisha [4.7K]

Answer:

n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean  

\mu population mean

\sigma=19 represent the assumed population standard deviation

n represent the sample size (variable of interest)  

Confidence =0.98 or 98%

Me=0.07 represent the margin of error for this case

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}  (1)  

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (2)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.01,0,1)", and we got z_{\alpha/2}=2.33, replacing into formula (2) we got:

n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40

So the answer for this case would be n=40 rounded up to the nearest integer

6 0
2 years ago
How many cm are in 3.05 miles?
mars1129 [50]

Answer:

490849.9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
There are 360 degrees in a circle. How many arc seconds will be in 96 % of a circle?
Umnica [9.8K]
1,244,160 arc-seconds
7 0
3 years ago
1. What is the last step in constructing an angle?<br> Help please<br> For 30 points!!!
zaharov [31]

Answer:

The second choice. Connect the endpoint and the mark at the angle measure.

Step-by-step explanation:

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2 years ago
PLEASE HELP!! WILL REQARD A LOT
Soloha48 [4]

9514 1404 393

Answer:

  17,500

Step-by-step explanation:

The problem can be written as a proportion:

  hits/revenue = 1000/(£2) = x/(£35)

Multiplying by £35 gives ...

  x = 1000(35/2) = 35000/2 = 17,500

17500 hits are required for revenue of £35.

3 0
2 years ago
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