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vitfil [10]
3 years ago
11

If n=28, ¯ x (x-bar)=50, and s=5, construct a confidence interval at a 99% confidence level. Assume the data came from a normall

y distributed population. Give your answers to one decimal place.
Mathematics
1 answer:
VLD [36.1K]3 years ago
6 0

Answer:

Step-by-step explanation:

Given that

n=28, ¯ x (x-bar)=50, and s=5

Here only sample std deviation is known, hence we can use only t critical value

df =n-1 =27

t critical = 2.05

Margin of error = 2.05 *\frac{s}{\sqrt{n} } \\=1.937

Confidence interval = 28±1.937

=(26.1, 29,9)

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A bug starts at the origin of the coordinate plane. The bug moves 1/4 units right and 1/4 units down to point A. Which graph sho
Vsevolod [243]

Answer:

<h2>The Answer would be (0.25, -0.25)</h2>

Step-by-step explanation:

Since you started at the origin of the plane, it would be obvious that your place would be 0.25 on the x-axis. The template for this would be (x,y) x- right and left. y- up and down. On the y-axis, the bug moved 0.25 DOWN to point A. That would be a negative since on the y-axis, it counts up to positives and down to negative. Similar to the x-axis, it counts right to positives, left to negatives. Hope this helped!

3 0
3 years ago
Read 2 more answers
Pleaseee answer asap.. thanks
andreyandreev [35.5K]

Answer:

the answer will be D

Step-by-step explanation:

5 0
3 years ago
Correct answers gets most brainiest!! :)
podryga [215]
Hello :)

Answer: x=11

Measure angel BAD= 122

Explanation:

To find X you have to make an equation

10x-49=5x+6

And then you solve for x

To find the angel measure of BAD, you have to add bac and cab to get bad

Bac= 10(11)-49 which equals 61

Cab= 5(11)+6=61

61+61= 122

Which is the measure of BAD

I hope this helps and have a wonderful rest of your night
6 0
2 years ago
I’m confused on what to do next please help
Mekhanik [1.2K]

Answer:

There are 585 adults and children

Step-by-step explanation:

Let the number of adults be a, number of children be c and the number of seniors be a

Amount made per group;

adults; 52 * a = 52a

Children : 26 * c = 26c

Seniors = 20 * s = 20s

Adding all will give 20,490

52a + 20s + 26c = 20 490 ••••(i)

Now let us work with the ratios;

a : s = 6 : 1

a/s = 6/1

a = 6s •••••(ii)

Lastly;

a/c = 4/9

4c = 9a ••••(ii)

We want to get a + c

From the first equation , let’s substitute

52(6s) + 20s + 26c = 20,490

26c = 6.5 (4c)

but 4c = 9a; 6.5(9a)

But a = 6s

So we have; 6.5(9)(6s) = 351s

so we have;

312s + 351s + 20s = 20,490

683s = 20,490

s = 20490/683

s = 30

Recall;

a = 6s = 6 * 30 = 180

4c = 9a

4c = 9 * 180

c = (9 * 180)/4 = 405

So the total number of children and adult is a + c

405 + 180 = 585

3 0
2 years ago
Jade read 24 pages of her book on Sunday and 16 pages on Tuesday. If her book is 82 pages long, how many more pages does she nee
Svet_ta [14]

she needs to read 42 more pages

24+16= 40

82-40=42

7 0
3 years ago
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