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3 years ago

A coin is tossed. The probability of getting tails is 1?2. What is the likelihood of getting tails?

Mathematics

1 answer:

max2010maxim [7]3 years ago

5 0

It’s a 50/50 chance since there is only 2 sides. (1?2)

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Ode to enchanted light Guiding Questions

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2 years ago

State the sufficient conditions for existence of Laplace

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What is the question

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3 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

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3 years ago

Plane A leaves Tulsa at 2:00 p.m., averaging 300 mph and flying in a northerly direction. Plane B leaves Tulsa at 2:30 p.m., ave

Musya8 [376]

Answer 1061

Step-by-step explanation:

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3 years ago

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-6 + -4y + -11y + 16y = -10<br> I need the answer A.S.A.P

Alja [10]

Answer:

y = -4

Step-by-step explanation:

Step 1 :

Solving a Single Variable Equation :

1.1 Solve : y+4 = 0

Subtract 4 from both sides of the equation :

y = -4

One solution was found :

y = -4

Processing ends successfully

plz mark me as brainliest :)

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3 years ago

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