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Elanso [62]
3 years ago
15

A dog allergy test for people a 98% accuracy rate.Only 1% of the population has an allergy to dogs(actually it is much smaller t

han that!). Use a group of 100,000 people who’ve taken this test and the information provided to complete a table and answer the following question:
If you tested negative,what is the probability you do not have a dog allergy?
(Express your answer as decimals rounded to four decimal places.)
Mathematics
1 answer:
algol [13]3 years ago
6 0

Answer:

It is 0.9990

As is 0.0010 as four decimal places. for those that do have which means the same as a negative probability that you don't but reaffirms the situation so inverse of 0.0010 is needed to be 0.9990. so when added together they can become 100% = 1 whole as a probability that both options equal together 1.

When questions ask it negatively using words like don't, haven't, didn't etc. etc.

This question asks for such probability which is similar to percentage in scale for those that do have an allergy.

If the question asked the probability you do have a non allergy the opposite effect happens and we inverse the answer to 99%

But because it asks negatively that you dont have we keep the establishing number of the actual allergy finding because its the same as if you don't.

1% of 100,000 = 1000

1000/100000 = 1/1000

1/1000 = 0.001

Step-by-step explanation:

Once you find 1/1000 is answer to turn numbers into decimals remember the rule 1 = 100

So if 1 = 100

and we want 1/100

1/100 will equal and simplify into 0.01

Where 1/1000 will equal and simplify into 0.001 as the number 100 is extended another digit so would the decimal.

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Rzqust [24]

Using the z-distribution, it is found that the 90% confidence interval is given by: (0.6350, 0.6984).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 90% confidence level, hence\alpha = 0.9, z is the value of Z that has a p-value of \frac{1+0.9}{2} = 0.95, so the critical value is z = 1.645.

The sample size and the estimate are given by:

n = 600, \pi = \frac{400}{600} = 0.6667

Hence, the bounds of the interval are given by:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6667 - 1.645\sqrt{\frac{0.6667(0.3333)}{600}} = 0.6350

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.6667 + 1.645\sqrt{\frac{0.6667(0.3333)}{600}} = 0.6984

The 90% confidence interval is given by: (0.6350, 0.6984).

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

5 0
2 years ago
a rectangle has an area of 1/6 squar centimeters and a length of 1.5 centimeters what is the width and the perimeter
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<span>

(1/6)/ 1.5 = 
(1/6)/(15/10)=
1/6*10/15=10/90=1/9 width</span>
3 0
3 years ago
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First you need to know some rules 2 numbers that are the same with coefficients divided : you differentiate those coeff
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12x^8/3x^3= 4x^8-3=4x^5

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m^5*m^-7=m^5-7=m^-2







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Please show how to get answer for if a bus traveled 315 miles in 9 hours, how far did it travel in 3 hours?
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Answer: Its will be 105

Step-by-step explanation: But this is how you get it 315 divided by 3 = 105 or 9x35=315 divided by 3 =105

4 0
2 years ago
a summer concert series has 12 different prerforming artisits. you decide to attend at least 4 of the concerts. how many differe
Maslowich

Answer:

48 I think

Step-by-step explanation:

6 0
3 years ago
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