Help!! Find the value of x

Complete question is;

About 130,000 high school students took the AP Statistics exam in 2010. The free-response section of the exam consisted of five open-ended problems and an investigative task. Each free-response question is scored on a 0 to 4 scale (with 4 being the best). For one of the problems, a random sample of 30 student papers yielded the scores that are graphed in the dot plot attached. The mean score for this sample is x¯ = 1.267 and the standard deviation is s = 1.230.

(a) Find and interpret the standard error of the mean.

(b) Construct and interpret a 99% confidence interval to estimate the mean score on this question. Use the four-step process.

Answer:

A) SOE = 0.225

The interpretation of this is that: if a sample size of 30 was taken, the difference between a sample mean score and a population mean score will be an average of 0.225

B) CI = (0.648, 1.886)

The interpretation of this is that;

We are 99% confident that that interval (0.648, 1.886) captures the true mean score of the AP Statistics exam in 2010

Step-by-step explanation:

A) We are given;

sample mean; x¯ = 1.267

Sample standard deviation; s = 1.230

Sample size; n = 30

Formula for standard error of the mean is;

SOE = s/√n

SOE = 1.23/√30

SOE = 0.225

The interpretation of this is that: if a sample size of 30 was taken, the difference between a sample mean score and a population mean score will be an average of 0.225.

B) we have a sample size of n = 30.

Thus;

DF = 30 - 1 = 29

We want to do a 99% Confidence interval.

From the attached t-table, we can see that critical t-value for DF = 29 and CL of 99%, we have t = 2.756

Formula for CI is;

CI = x¯ ± t(s/√n)

CI = 1.267 ± 2.756(1.23/√30)

CI = 1.267 ± 0.619

CI = (0.648,1.886)

The interpretation of this is that;

We are 99% confident that that interval (0.648, 1.886) captures the true mean score of the AP Statistics exam in 2010.

Answer:

what is the quenstion ?

Step-by-step explanation:

Naudia's distance from her starting point will be 3.60 miles.

Pythagorean theorem states that in the right angle triangle the hypotenuse square is equal to the square of the sum of the other two sides. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.

Given that Naudia rode her bike two miles south. Then, she went east for three miles.

The distance will be calculated by using the Pythagorean formula.

c² = a² + b²

c² = 2² + 3²

c² = 4 + 9

c =  √13 = 3.60

Therefore, Naudia's distance from her starting point will be 3.60 miles.

To know more about the Pythagorean theorem follow

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Answer:

Rate of Temperature Change = 3.5 degrees per hour

Step-by-step explanation:

In order to calculate the rate of rising of the temperature in degrees per hour, we will use the following formula:

[tex]Rate\ of\ Temperature\ Change = \frac{Rise\ in\ Temperature}{Time\ Taken\ for\ the\ Rise} \\\\[/tex]

where,

Rise in temperature = 2 and 1/2 degree = 2.5 degrees

Time taken for the Rise = 2/3 of an hour = 0.667 h

Therefore,

[tex]Rate\ of\ Temperature\ Change = \frac{2.5\ degrees}{0.667\ h}\\[/tex]

Rate of Temperature Change = 3.5 degrees per hour

Answer:

i believe it's 992 i had this same question back in the day but i forget

Answer:

5x, I think

Step-by-step explanation:

7x-2 is 5x so I think that's what it is

Answer: The product is less than 3/5

Step-by-step explanation:

To know the solution, we have to multiply 3/5 by 6/7. This will be:

= 3/5 × 6/7

= 18/35

Note:

18/35 to decimal = 0.5143

3/5 to decimal = 0.60

6/7 to decimal = 0.8571

Therefore, we can see that the product is less than 3/5.

Answer:

1. Go around an pick up trash around your neighborhood

2. Separate all the recyclables

3. Work on a Garden

4. Plant something

5. Fund teamtrees.org

6. Tell a friend to do something on this list

7. Don't use any fossil fuel or electricity required things (Like your car, walk instead, or your phone)

8. Dont Eat at any fast food or gourmet restaurants.

9. Eat Healthier no factory produced foods

10. Go on Brainly.com and help some one with their question :D

(っ◔◡◔)っ ♥ Hope It Helps ♥ Please Consider giving Brainliest

Answer:

Any 10 earth day activities are:

Answer:

28.26

Step-by-step explanation:pie x r^2

Answer: look at the picture

Step-by-step explanation: Hope this help :D

Answer:

[tex]{k = - \frac{363}{8} \: \: \: or \: \: - 45 \frac{3}{8} } \\ [/tex]

Step-by-step explanation:

-8(k + 46) = -5

Expand the terms on the right

-8k - 368 = - 5

Add 368 to both sides of the equation

- 8k - 368 + 368 = - 5 + 368

- 8k = 363

Divide both sides by - 8

[tex] \frac{ - 8k}{ - 8} = - \frac{363}{8} \\[/tex]

We have the final answer as

[tex]k = - \frac{363}{8} \: \: \: or \: \: - 45 \frac{3}{8} \\ [/tex]

Hope this helps you

Answer:

0.08 kilograms

Step-by-step explanation:

0.4 divided by 8 equals 0.08

Answer:

48 i think

Step-by-step explanation:you add both bases so 4+8=12 divided by 2 to get 6 and then multiply by 8 to get 48 i think im sorry if its wrong

Answer:

the answer is C

Step-by-step explanation:

lemme kno if i got it wrong !

Answer:

x^2+(y-5)^2=25

Step-by-step explanation:

since you have a 5 in the y thats why the 5 ends up where it does. Then the radius is squared which is why you end up with that in this

Answer:

A... .................. ....

Answer:

2.85

Step-by-step explanation:

You will pay $2.85 for a item with original price of $3.80 when discounted 25%. In this example, if you buy an item at $3.80 with 25% discount, you will pay 3.80 - 0.95 = 2.85 dollars.

Answer:

2.85

Step-by-step explanation:

25%= 100÷25=4

3.80÷4 =0.95

25% of 3.80 = 0.95

discounted price:

3.80-0.95

=2.85

Answer:

5-8

Step-by-step explanation:

Answer:

The orginial angle is a right angle (however, the pair of angles would be classified as complementary angles); the value of x is 28.

Step-by-step explanation:

It's important to note that a right angle is always 90°.

90 - 56 = 34

Set up an equation to solve for x:

34 - 6 = x

34 - 6 = 28

28 = x

Now, check if the answer is correct.

Add up both angles' measurements:

56 + (28 + 6) = 90

Answer:

360 elk are likely to be infected.

Answer: it A

Step-by-step explanation: Hope this help :D

Answer:

Step-by-step explanation:

(A) It has 3 terms and highest degree of 4. It is trinomial of degree 4.

(B) It has 2 terms and highest degree of 3. It is binomial of degree 3.

(C) It has 2 terms and highest degree of 7. It is binomial of degree 7.

(D) It has 2 terms and highest degree of 3. It is binomial of degree 3.

Answer:

$76

Step-by-step explanation:

yeah i can't really explain kinda complicated

Step-by-step explanation:

volume of a cylinder =xr^2h

756=22/7×6^2h

756=22/7×36h

756=113.142h

756/113.14=h

h=6.7cm

Answer:

The band that took on a soda? ___ become a pop song

Step-by-step explanation:

Answer:

8x+5x+10+6=

13x+16 this is ur answer

Answer:

The y-intercept is 5

Step-by-step explanation:

y=mx+b

m is your slope while b is your y-intercept

Therefore your y-intercept is 5

Your Welcome.

Answer:

The y intercept is 5

Step-by-step explanation:

Y=MX+B

B= the y intercept.

5 is in the spot for B

Therefor, 5 is the y intercept.

Hope this helps have a great day. :)