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2 years ago

How could you estimate the quotient 162 divided 19? i need help!!!

Mathematics

1 answer:

Ira Lisetskai [31]2 years ago

6 0

It = 6.888888888 and you can round it to 7

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I need help please?!!

Fiesta28 [93]

Answer:

-45

Step-by-step explanation:

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3 years ago

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The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airp

motikmotik

Answer:

The 95% confidence interval for the population mean rating is (5.73, 6.95).

Step-by-step explanation:

We start by calculating the mean and standard deviation of the sample:

$M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{50}(6+4+6+. . .+6)\\\\\\M=\dfrac{317}{50}\\\\\\M=6.34\\\\\\s=\sqrt{\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M)^2}\\\\\\s=\sqrt{\dfrac{1}{49}((6-6.34)^2+(4-6.34)^2+(6-6.34)^2+. . . +(6-6.34)^2)}\\\\\\s=\sqrt{\dfrac{229.22}{49}}\\\\\\s=\sqrt{4.68}=2.16\\\\\\$

We have to calculate a 95% confidence interval for the mean.

The population standard deviation is not known, so we have to estimate it from the sample standard deviation and use a t-students distribution to calculate the critical value.

The sample mean is M=6.34.

The sample size is N=50.

When σ is not known, s divided by the square root of N is used as an estimate of σM:

$s_M=\dfrac{s}{\sqrt{N}}=\dfrac{2.16}{\sqrt{50}}=\dfrac{2.16}{7.071}=0.305$

The degrees of freedom for this sample size are:

$df=n-1=50-1=49$

The t-value for a 95% confidence interval and 49 degrees of freedom is t=2.01.

The margin of error (MOE) can be calculated as:

$MOE=t\cdot s_M=2.01 \cdot 0.305=0.61$

Then, the lower and upper bounds of the confidence interval are:

$LL=M-t \cdot s_M = 6.34-0.61=5.73\\\\UL=M+t \cdot s_M = 6.34+0.61=6.95$

The 95% confidence interval for the mean is (5.73, 6.95).

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3 years ago

Divide x^2+7x+12 by x+3 using long division

Trava [24]

X^2+7x+12/x+3
x^2+7x+12/x+3
x^3+7x^2+12+3x/x
x^3+7x^2+3x+12/x

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2 years ago

.711 rounded to the nearest tenth

Natalka [10]

Answer: 710

Hope this helps

<h2>Please mark me as brainliest</h2>

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2 years ago

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Which of these triangels apears not to be congruent to any others shown here check all that apply

masha68 [24]

Triangles are congruent when they have exactly the same three sides and exactly the same three angles.

The diagram shows two pairs of congruent triangle:

triangle C is congruent to triangle E (have exactly the same three sides and exactly the same three angles);
triangle D is congruent tot triangle F (have exactly the same three sides and exactly the same three angles).

Triangles A and B apears not to be congruent to any others triangles.

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2 years ago

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