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Alja [10]
3 years ago
10

A study intends to estimate a population mean with an unknown population standard deviation and a sample size of 15. Which of th

e following is closest to the appropriate critical value to create a 98% confidence interval?
Mathematics
1 answer:
GuDViN [60]3 years ago
5 0

Answer:2.624

Step-by-step explanation:

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I NEED HELP ASAP!! WILL MAKE YOU BRAINLIEST IF RIGHT +40 points!
Simora [160]

The standard form of a quadratic equation is ,

ax² + bx + c = 0.

And the formula to find the discriminant is b² - 4ac.

Here the first step is to change the given equation into standard form. So, add 1 to each sides of the equation. Therefore,

2x² – 9x + 2+1 = –1 + 1

2x² – 9x + 3 = 0

Next step is to compare the given equation with this equation to get the value of a, b and c.

After comparing the equations we will get a = 2, b = -9 and c = 3.

So, discriminant = b²- 4ac

=( -9)²-4 (2)(3)

= 81 - 24

= 57

So, discriminant of the given equation is 57.

57 is greater than 0 and square root of 57 will result real number.

So, the correct choice is C: The discriminant is greater than 0, so there are two real roots.

8 0
3 years ago
Read 2 more answers
Find x please I will give brainlest.
Lesechka [4]

Answer:

x=28

Step-by-step explanation:

6(x+2)=180 Step 1: Write equation

6x+12=180 step 2: Expand the equation

6x=168 Step 3: Do 180-12 first

x=28 Step 4: Divide by 6 answer you got in Step 3

Step 5: replace 28 with x to see if it's correct 6(28+2)= 180

Put comment if answer is wrong and i will change my answer soon as possible    

I hope this helps

4 0
3 years ago
Read 2 more answers
NEED HELP ASAP PLEASE!
exis [7]
1B
2C
p/s : follow me and I will help you more about maths
5 0
3 years ago
An animal shelter currently has 30 dogs and 15 cats. What is the ratio of
Alenkasestr [34]

Answer:

1:3

Step-by-step explanation:

The total animals is 45 and the cats is 15.

The ratio is 15:45

Simplified, it would be 1:3 because you can divide each side my 15.

Hope this helped!! :)

Brainliest?!?!

Have a safe and wonderful day/night/afternoon!!!

7 0
3 years ago
What is the length of the unknown side of the right triangle? (1 point)
Lynna [10]

Answer:

c) 25

Step-by-step explanation:

Pythagorean theorem: a²+b²=c²

Substitution: 7²+24²=x²

49+576=x²

625=x²

25=x

5 0
3 years ago
Read 2 more answers
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