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pishuonlain [190]
3 years ago
11

PLEASE HELP ME IM STUCK ON MY MATH EXAMS

Mathematics
1 answer:
ra1l [238]3 years ago
4 0

Answer:

yes I agree on the terms and policy here and my language I'm not sure what to think we are good to be in touch with my mom to call me when I get your address so we are working with my family in each group of peoples

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Lol I’m struggling very much
Alex73 [517]

Look all you have to do is with each question draw a line to the answer I am going to help you. Mark the 3rd question with answer A Mark the second question with b and the first one C I might be wrong with the first one. Hope this helps  

3 0
3 years ago
Find the Geometric mean x of 5 and 20
Ugo [173]
Geometric mean =x=<span>√(5 × 20) 
                               =</span>√100
                               =10
8 0
3 years ago
A laundry detergent box measures 12 inches by 8 inches by 2 inches. What is the volume of the box of detergent?
antoniya [11.8K]
The answer is 12x8x2 so it would be 192
4 0
3 years ago
Read 2 more answers
A market research team thinks that their new ad campaign is better than their old one. They used to be able to sell to 50% of th
andreev551 [17]

Answer:

a. The test statistic is 2 and we conclude that the new ad campaign is not signficantly better.

Step-by-step explanation:

They used to be able to sell to 50% of those who saw their ads. Test if the new campaign is better.

At the null hypothesis, we test is it is the same, that is, the proportion is the same.

H_0: p = 0.5

At the alternate hypothesis, we test if it is significantly better, that is, the proportion is above 50%.

H_1: p > 0.5

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.5 is tested at the null hypothesis:

This means that \mu = 0.5, \sigma = \sqrt{0.5*0.5} = 0.5

They take a random sample of 100 potential buyers and find that they convinced 60 of these people to buy their product.

This means that n = 100, X = \frac{60}{100} = 0.6

Test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.6 - 0.5}{\frac{0.5}{\sqrt{100}}}

z = 2

The test statistic is 2.

P-value of the test and decision:

The p-value of the test is the probability of finding a sample proportion above 0.6, which is 1 subtracted the by p-value of z = 2.

Looking at the z-table, z = 2 has a p-value of 0.9772.

1 - 0.9772 = 0.0228.

The p-value of the test is 0.0228 > 0.01, which means that we cannot conclude that the new ad campaign is signficantly better, so the correct answer is given by option A.

5 0
3 years ago
the population of cities A and B are 3.8 x 10^5 and 2,160,000 , respectively . the population of city C is twice the population
erma4kov [3.2K]
The answer is 4, 320, 000


explanation: the problem is asking what the population of city c is, and to do that you need to multiply city b times 2. therefore you do not need the population of city a, it is just there to confuse you
5 0
3 years ago
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