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vlada-n [284]
3 years ago
5

Pls help me in this one

Mathematics
2 answers:
valkas [14]3 years ago
7 0
This answer is a. A is the only reasonable answer that makes sense
Dmitriy789 [7]3 years ago
4 0
Yeah the answer is A
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A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. T
Oksanka [162]

Answer:

The null and alternative hypotheses are:

H_{0}:\mu=75

H_{a} : \mu>75

Under the null hypothesis, the test statistic is:

t=\frac{\bar{x}-\mu}{\frac{s}{\sqrt{n}} }

Where:

\bar{x} =83 is the sample mean

s=9.8206 is the sample standard deviation

n=10 is the sample size

\therefore t= \frac{83-75}{\frac{9.8206}{\sqrt{10}} }

         =2.58

Now, we can find the right tailed t critical value at 0.01 significance level for df = n-1 = 10 - 1 = 9 using the t distribution table. The t critical value is given below:

t_{critical} =2.821

Since the test statistic is less than the t critical value, we therefore, fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the people do better with the new edition.

7 0
3 years ago
Solve 2x2 – 6x + 10 = 0 by completing the square.
Elanso [62]

Answer:

The answer is C.)

Step-by-step explanation:

I hope its help Please let me know.

3 0
3 years ago
From the Pythagorean theorem, what can you inter about<br> the hypotenuse a right triangle?
wolverine [178]

Answer:

Step-by-step explanation:

it is the side that is oppistie of the right angle

6 0
3 years ago
A pilot needs to know the maximum height an aircraft can fly at. The cabin has
oee [108]

round it to a whole number of 100 m witch i think would be 15700 m

also i dint realize it said round it to a whole number and to 100 m so it would also be a whole number of 16000 i think if not this than 20000

3 0
3 years ago
Read 2 more answers
What is the product of (1x-7)(2x^3-5x+3)
Nana76 [90]
You would distribute each number. Then afterwards simplify what you have into standard form. Once you have it in standard form you use the quadratic formula. The end answers are 1 and 7

8 0
3 years ago
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