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zhannawk [14.2K]
3 years ago
5

Urgent!! Help math!!

Mathematics
1 answer:
mylen [45]3 years ago
4 0

10,11,15   is  not right triangle

30,40,50  is right triangle

9,13,16    is  not right angel

16,30,34 is  right triangle

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A publisher reports that 63c% of their readers own a personal computer. A marketing executive wants to test the claim that the p
rusak2 [61]

Answer:

Null hypothesis is not rejecting at 0.05 level.

Step-by-step explanation:

We are given that a publisher reports that 63% of their readers own a personal computer. A random sample of 110 found that 56% of the readers owned a personal computer.

And, a marketing executive wants to test the claim that the percentage is actually different from the reported percentage, i.e;

Null Hypothesis, H_0 : p = 0.63 {means that the percentage of readers who own a personal computer is same as reported 63%}

Alternate Hypothesis, H_1 : p \neq 0.63 {means that the percentage of readers who own a personal computer is different from the reported 63%}

The test statistics we will use here is;

                T.S. = \frac{\hat p -p}{\sqrt{\frac{\hat p(1- \hat p)}{n} } } ~ N(0,1)

where, p = actual % of readers who own a personal computer = 0.63

            \hat p = percentage of readers who own a personal computer in a

                   sample of 110 = 0.56

           n = sample size = 110

So, Test statistics = \frac{0.56 -0.63}{\sqrt{\frac{0.56(1- 0.56)}{110} } }

                             = -1.48

Now, at 0.05 significance level, the z table gives critical value of -1.96 to 1.96. Since our test statistics lie in the range of critical values which means it doesn't lie in the rejection region, so we have insufficient evidence to reject null hypothesis.

Therefore, null hypothesis is not rejecting at 0.05 level.

3 0
3 years ago
Kate is playing a game with a set of 24 cards equally divided into 4 colors (red, green, blue, and yellow). Find the probability
Karo-lina-s [1.5K]
Is B because yes is B
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3 years ago
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Find the inverse of the function f(x)=−4x2−8, x≤0.
xxTIMURxx [149]
\sqrt{ \frac{x+8}{-4} }

You get this by switching the f(x) and the x and then solving for the new f(x)
6 0
3 years ago
A game decreases in price by 1/3 . After the reduction it was priced £32. What was the original price of the game
a_sh-v [17]

Answer:

96

Step-by-step explanation:

it 32 x 3

7 0
2 years ago
I suck at this type of math because the teacher did not explain good enough and I’m stuck.
lisabon 2012 [21]

Answer:

21

Step-by-step explanation:

2^2+b^2=5^2

4+b^2=25

b^2=21

<3

Red

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3 years ago
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