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sergey [27]
1 year ago
14

The College Board states that the average math SAT score is 514 with a standard deviation of 117. Colleen gathered data from 50

students in her graduating class and found the average score to be 523. She thinks that her class’s math SAT score is different from the average. Which of the following are the correct null hypothesis and alternate hypothesis?
Mathematics
2 answers:
ratelena [41]1 year ago
7 0
In hypothesis testing, A null hypothesis (H0) is a claim which the person conducting the research wants to test while an alternative hypothesis (H1) is a contradiction of the null hypothesis.

There are two types of tests in hypothesis testing.

One tailed test: In one tailed test, a claim that a parameter is greater than/ less than a value is being tested. i.e mean > value or mean < value.

Two tailed test: In a two tailed test, a claim that a value is equal to a value is tested, i.e mean = value.

In the question above, Colleen is testing the claim that the average score of her class is the same as others against that it is different from others.
Therefore, the null hypothesis is H0: mean = 514 while the alternative hypothesis is H1: mean ≠ 514
kherson [118]1 year ago
6 0

Answer:

C

Step-by-step explanation:

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Kara and James both like to mix a little bit of milk with their eggs when they make scrambled eggs. Kara mixes ¾ of a tablespoon
Diano4ka-milaya [45]

Answer:

No, there is not a proportional relationship.

Step-by-step explanation:

A proportional relationship is when 2 amounts have the same ratios.

The easiest way to see this is to put them into decimal form.

3/4 is equal to 0.75 (You can find this by dividing 3 and 4 in the calculator)

1 1/4 is equal to 1.25

Kara mixes every 0.75 with 1 egg.

James mixes every 1.25 tablespoons with 2 eggs.

Divide 1.25 by 2 to find out how many tablespoons that James mixes with 1 egg.

1.25  tablespoons /2 = 0.625

2 eggs                   /2 = 1 egg  

Therefore, James mixes 0.625 tablespoons of milk with 1 egg.

They do not mix the same amount of tablespoons of milk for ever ONE egg,  meaning that they are not proportional.

8 0
2 years ago
Read 2 more answers
What is the solution for 1/2+x=5/4
prohojiy [21]
<span>1/2-(5/4) = x+1/4 // - x+1/4

1/2-x-(5/4)-(1/4) = 0

1/2-x-5/4-1/4 = 0

-x-1 = 0 // + 1

-x = 1 // * -1

x = -1

x = -1
</span>
7 0
1 year ago
Someone help please
Fofino [41]

Answer:

Top left is 7x^2. Top right is 14x. Bottom left is -4x. Bottom right is -8.

Step-by-step explanation:

7 0
1 year ago
Evaluate the following.<br> (a) |6| - 9 =<br> (b) |6 - 9| =
IRISSAK [1]

Answer:

  • (a) -3, (b) 3

Step-by-step explanation:

  • (a) |6| - 9 = 6 - 9 = -3
  • (b) |6 - 9| = |-3| = 3
6 0
1 year ago
Find the sum of the first n terms
tatuchka [14]

The sum of the first n terms of sequence 85 +85(.9) +85(.9)² + ... would be 348.08.

<h3>What is the sum of terms of a geometric sequence?</h3>

Let's suppose its initial term is a , multiplication factor is  r and let it has total n terms,

then, its sum is given as:

S_n = \dfra\dfrac{a(r^n-1)}{r-1}

(sum till nth term)

Given geometric sequence;

85 +85(.9) +85(.9)² + ...

a = 85

r = 0.9

its sum is given as:

S_n = \dfra\dfrac{a(r^n-1)}{r-1}

S_n = \dfrac{85(0.9^5-1)}{0.9-1}\\\\S_n = \dfrac{85(0.5904-1)}{-0.1}\\\\\\S_n = \dfrac{85(-0.4095)}{-0.1}\\\\S_n = 348.08

Thus,

The sum of the first n terms of sequence 85 +85(.9) +85(.9)² + ... would be 348.08.

Learn more about geometric sequence here:

brainly.com/question/2735005

#SPJ1

3 0
10 months ago
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