MATHEMATICS MIDDLE SCHOOL

What is the circumference of the following circle? if r= 4

Answers

Answer 1

Answer:

Answer:

C≈25.13

Step-by-step explanation:

C≈2 x 4 x 3.14

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34 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 25.9 pounds and a standard deviation of 3.8 pounds. What is the 95% confidence interval for the true mean weight, μ, of all packages received by the parcel service?24.6 < μ < 27.2

24.8 < μ < 27.0

24.2 < μ < 27.6

24.4 < μ < 27.4

Answers

The 95% confidence interval for the true mean weight, μ, of all packages received by the parcel service is;

Option A; 24.6 < μ < 27.2

We are given;

Sample mean; x' = 25.9 pounds

Standard deviation; σ = 3.8 pounds

Confidence level; CL = 95%

Sample size; n = 34

Now formula for confidence interval is;

CI = x' ± z( σ/√n)

Where z is critical value at given confidence level.

z at CL of 95% is; z = 1.96

Thus;

CI = 25.9 ± 1.96(3.8/√34)

CI = 25.9 ± 1.3

CI = (25.9 - 1.3), (25.9 + 1.3)

CI = (24.6, 27.2)

Read more at; brainly.com/question/12970960

Answer:

24.6 < μ < 27.2

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:

$\alpha = (1-0.95)/(2) = 0.025$

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

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*(\sigma)/(√(n))$

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

$M = 1.96(3.8)/(√(34)) = 1.3$

The lower end of the interval is the sample mean subtracted by M. So it is 25.9 - 1.3 = 24.6 pounds.

The upper end of the interval is the sample mean added to M. So it is 25.9 + 1.3 = 27.2 pounds.

So the correct answer is:

24.6 < μ < 27.2

What is three and seven eights as an improper fraction

Answers

well 3 x 8 = 24 + 7 = 31 so 31/8

The answer is 31/8 because 8 X 3 is 24 then you add 7 to 24.

A water cooler holds 4.8 gallons of water. The container is .65 full. How many gallons of water are in the cooler?

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I think that it is 4.15 I'm not sure pls no hate

Which is the answer 3.6÷3 and how can solve?

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Answer: 1.2

Why? Here:

3.6 is also known as 36/100

So, 36/100 ÷ 3/1

36/100 x 1/3 ( transposing because of divide)

36 comes in 3 table so, 36÷3 is 12

12/100 x 1

12/100 also known as 1.2

163 rounded to the nearest ten

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Answer is 160 because 3 is closer to 60 so its 160

its probably 160 dude.

Hi my math teacher makes my life impossible and I have no clue how to do this thanks!

Answers

the answer is x^3 (when you have product of powers you just add them.).

Answer:

x3, because when you have the powers (in x6, the "6" is the power) then you add the powers. x3 + x6 = x9. So your answer is x3.

Step-by-step explanation:

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