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Hoochie [10]
2 years ago
10

I NEED HELP(10 POINTS) ON THIS PROBLEM

Mathematics
1 answer:
agasfer [191]2 years ago
8 0
(1250-140)/2

1110/2

answer= 550

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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
Please show your work<br> <img src="https://tex.z-dn.net/?f=1%5Cfrac%7B2%7D%7B3%7D%20%2B%202%5Cfrac%7B3%7D%7B4%7D" id="TexFormul
Shkiper50 [21]

Answer:

→1 \frac{2}{3}  + 2 \frac{3}{4}  \\  =  \frac{5}{3}  +  \frac{11}{4}  \\  =  \frac{20 + 33}{12}  \\  = \frac{53}{12}\\ =\boxed{4\frac{5}{12}}✓

  • <u>5</u><u>3</u><u>/</u><u>1</u><u>2</u> is the right answer.
6 0
3 years ago
Read 2 more answers
A. [1 3
Trava [24]

<em>D. [ 6 10 </em>

<em>-8 0]</em>


<em>would be the correct answer.</em>

7 0
3 years ago
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What is the scientific notation of 0.00277
pentagon [3]
The answer is 2.77 • 10^3
6 0
2 years ago
Write the word sentence as an inequality: A number y plus 2 is greater than -5​
MrMuchimi

Answer:

y+2≥5(≥ we don't need the_ because i can't find the symbols)

Step-by-step explanation:

5 0
3 years ago
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