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Arisa [49]
3 years ago
10

Dennis surveyed 30 students to determine their favorite fall sports. Of the students surveyed, 15 preferred football, 6 preferre

d soccer, and the rest preferred volleyball. Which is a correct statement about the results from the survey?
Mathematics
2 answers:
Olin [163]3 years ago
3 0
Are the options to choose from? That is what it seems like.
svetlana [45]3 years ago
3 0
<span>Of the students surveyed, 30% preferred volleyball. </span>
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The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of m
UkoKoshka [18]

Answer:

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

X \sim N(14.7,3.7)  

Where \mu=14.7 and \sigma=3.7

Since the distribution of X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we have;

\mu_{\bar X}= 14.70

\sigma_{\bar X} =\frac{3.7}{\sqrt{40}}= 0.59

Step-by-step explanation:

Assuming this question: The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally distributed with a mean of 14.7 minutes and a standard deviation of 3.7 minutes. Let R be the mean delivery time for a random sample of 40 orders at this restaurant. Calculate the mean and standard deviation of \bar X Round your answers to two decimal places.

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the delivery times of a population, and for this case we know the distribution for X is given by:

X \sim N(14.7,3.7)  

Where \mu=14.7 and \sigma=3.7

Since the distribution of X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we have;

\mu_{\bar X}= 14.70

\sigma_{\bar X} =\frac{3.7}{\sqrt{40}}= 0.59

4 0
3 years ago
Jason can paint a wall in 20 minutes. Leah can paint the same wall in 10 minutes.
Vilka [71]

Answer:

There is no solution to this answer.

Step-by-step explanation:

Leah's rate is 10x

Jason's rate is 20x

If you solve for 20x=10x, you get no solution. They are parallel lines.

8 0
3 years ago
Just trying to pass math man
makkiz [27]
The answer is 3x^2 +3x
6 0
2 years ago
Least common factor of 12 20 and 24
Ymorist [56]

Answer:

2 is the LCF :)

Step-by-step explanation:

All are divisible by 2. 2 is the lowest number than even numbers can be divided by.

5 0
3 years ago
How is multiplying exponents (x^2*x^4) different from raising a power to a power((x^2)^4)? Ty =)
Contact [7]

Answer:

When your multiplying exponents in the same parenthasis like x^2*x^4, you'll add the exponents so it will be x^6. If it is outside the parenthasis like (x^2)^4 you'll multiply the exponents so it will be x^8. good luck! :)

Step-by-step explanation:

8 0
3 years ago
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