Deanna uses only fruit juice and sparkling water to make

The useful life of a radial tire is normally distributed with a mean of 30,000 miles and a standard deviation of 5000 miles. The

otez555 [7]

Answer:

empirical rule: 81.5%

table or calculator: 81.9%

Step-by-step explanation:

The lower limit of the life range of interest has a z-score of ...

z = (x -μ)/σ = (20,000 -30,000)/5,000 = -2

The upper limit has a z-score of ...

z = (35,000 -30,000)/5,000 = 1

<u>Empirical rule solution</u>

The empirical rule tells you that 95% of the distribution lies within 2 standard deviations of the mean, so (100% -95%)/2 = 2.5% lie below z = -2. It also tells you 68% lie within 1 standard deviation of the mean, so (100% -68%)/2 = 16% lie above z = 1.

The fraction that lies within -2 to 1 standard deviations of the means is thus ...

(100% -2.5% -16%) = 81.5%

The probability the tire has a life in the desired range is about 81.5%.

__

<u>Calculator solution</u>

A probability calculator for the Normal distribution tells you that ...

P(-2 < z < 1) ≈ 0.8185946

The probability the tire has a life in the desired range is about 81.9%.

6 0

3 years ago

You want to know the opinions of homo-schooled students across America on whether they prefer to loarn at home versus at a publi

pashok25 [27]

In this survey, the results can be trusted because more than half of the people responded which makes this sample to be representative.

<h3>What is nonresponse bias?</h3>

This occurs when most of the people who were intended to be surveyed do not respond, which causes the results to be biased as the sample does not represent the population.

<h3>Can the results of this survey be trusted?</h3>

Considering more than 50% answer it is likely the results can be trusted as the sample is still representative.

Learn more about sample in: brainly.com/question/11045407

#SPJ1

4 0

2 years ago

A box contains 4 red pencils and 6 black pencils. What fraction of he pencils are red? What fraction of pencils are black? Draw

Scorpion4ik [409]

Answer:

The fraction of the pencils that are red is 4/10. The fraction of the pencils that are black is 6/10.

Step-by-step explanation:

[I can't draw you a model but I reccomend that when you do, you seperate it into 10 pieces and mark 4 as red pencils and 6 as black pencils. You could also simplify 4/10 to 2/5 and 6/10 to 3/5, but instead you'd seperate the model into 5 pieces and mark 2 as red pencils and 3 as black pencils.]

First, let's add this up so we have our denominator.

4 + 6 = 10.

Now that we know that the denominator is 10, we apply it to the question.

<em>The box has 4/10 red pencils and 6/10 black pencils.</em>

<em>The box has 4/10 red pencils and 6/10 black pencils.If you were to simplify, it'd be 2/5 red pencils and 3/5 black pencils.</em>

3 0

3 years ago

What is the area of triangle LMN? Round to the nearest square meter.

kolezko [41]

<span>The answer is 9 square meters.</span>

7 0

3 years ago

Read 2 more answers

7

stira [4]

1/15 min per centimeter. is the answer

6 0

3 years ago