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Arisa [49]
2 years ago
8

I need help on this please

Mathematics
1 answer:
irakobra [83]2 years ago
4 0
The answer is C :$396.00
You might be interested in
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
2 years ago
I need help for #1 (an explanation would be great too).
Ivan

Answer:

±6i√2

Step-by-step explanation:

Recall that the square root of a negative number is imaginary, which is shown by the use of "i."

Examples:  √4 = ±2; √4 = i√4 = ±i2

Then √72 = ±√36√2 = ±6√2, and

   

      √(-72) = ± i√36√2 = ±6i√2

         

Note that this is identical to the result shown in the problem:  √(36·2·(-1) )

5 0
3 years ago
60 people attend a game night. Everyone chooses to play chess, a two-player game, or Uno, a
AysviL [449]

Answer:

14-8

12-9

0-15

2-14

Step-by-step explanation:

7 0
3 years ago
Quizizz help 10 pts each brainiest guaranteed blah blah blah
emmainna [20.7K]

Answer:

5x^3-2x^2+2x+9

Step-by-step explanation:

(5x^3+4x^2)−(6x^2−2x−9)

To find the opposite of 6x^2−2x−9 find the opposite of each term.

5x^3+4x^2−6x^2+2x+9

Combine 4x^2 and 6x^2 to get −2x^2.

5x^3-2x^2+2x+9

5 0
2 years ago
Read 2 more answers
1/3v= -5 What is the value if v?
beks73 [17]

Given:

\frac{1}{3}v=-5

To get rid of the fraction, we can multiply both sides by the denominator, which is 3. This will cancel the fraction:

3(\frac{1}{3}v)=3(-5)

We are left with:

v=-15

3 0
3 years ago
Read 2 more answers
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