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konstantin123 [22]
2 years ago
11

Whats brainly the app

Mathematics
2 answers:
Kryger [21]2 years ago
8 0

Answer:

It is a version of Brainly for your phone.

jeka57 [31]2 years ago
5 0

Answer:

its brainly

Step-by-step explanation:

its basically an app that helps with homework (its kinda cheating tho)

soooo just sayin (can i have brainliest) dont feel bad and have a great time here :)

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According to the last census (2010), the mean number of people per household in the United States is LaTeX: \mu = 2.58 Assume a
Veseljchak [2.6K]

Answer:

P(2.50 < Xbar < 2.66) = 0.046

Step-by-step explanation:

We are given that Population Mean, \mu = 2.58 and Standard deviation, \sigma = 0.75

Also, a random sample (n) of 110 households is taken.

Let Xbar = sample mean household size

The z score probability distribution for sample mean is give by;

             Z = \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

So, probability that the sample mean household size is between 2.50 and 2.66 people = P(2.50 < Xbar < 2.66)

P(2.50 < Xbar < 2.66) = P(Xbar < 2.66) - P(Xbar \leq 2.50)

P(Xbar < 2.66) = P( \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{2.66-2.78}{\frac{0.75}{\sqrt{110} } } ) = P(Z < -1.68) = 1 - P(Z  1.68)

                                                              = 1 - 0.95352 = 0.04648

P(Xbar \leq 2.50) = P( \frac{Xbar-\mu}{\frac{\sigma}{\sqrt{n} } } \leq \frac{2.50-2.78}{\frac{0.75}{\sqrt{110} } }  ) = P(Z \leq  -3.92) = 1 - P(Z < 3.92)

                                                              = 1 - 0.99996 = 0.00004  

Therefore, P(2.50 < Xbar < 2.66) = 0.04648 - 0.00004 = 0.046

7 0
3 years ago
Angle A is an acute angle in a right triangle
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300/60=5 so your answer is 5 hours
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A plane covers 2,160 miles in 5.5 hours. what is the average speed of the plane to the nearest tenth?
pantera1 [17]
2160 divided by 5.5 = 392.7 hopefully this is right!

8 0
2 years ago
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शेळीच्या दुधा पासून बनवलेला दह्यासारखा पद्धत कोणता​
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