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valina [46]
3 years ago
12

Helppp messsss please

Mathematics
2 answers:
Sphinxa [80]3 years ago
7 0
The first answer is correct
Gelneren [198K]3 years ago
4 0
The answer is the first one
Comment if you need a better explanation :)
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A 99% confidence interval for the difference between two proportions was estimated at 0.11, 0.39. Based on this, we can conclude
sladkih [1.3K]

Answer:

\hat p_1 -\hat p_2 \pm z_{\alpha/2} SE

And for this case the confidence interval is given by:

0.11 \leq p_1 -p_2 \leq 0.39

Since the confidenc einterval not contains the value 0 we can conclude that we have significant difference between the two population proportion of interest 1% of significance given. So then we can't conclude that the two proportions are equal

Step-by-step explanation:

Let p1 and p2 the population proportions of interest and let \hat p_1 and \hat p_2 the estimators for the proportions we know that the confidence interval for the difference of proportions is given by this formula:

\hat p_1 -\hat p_2 \pm z_{\alpha/2} SE

And for this case the confidence interval is given by:

0.11 \leq p_1 -p_2 \leq 0.39

Since the confidence interval not contains the value 0 we can conclude that we have significant difference between the two population proportion of interest 1% of significance given. So then we can't conclude that the two proportions are equal

4 0
3 years ago
What is 221,000,000,000,000,000,000 expressed in scientific notation? a.2.21 × 1021 b.2.21E20 c.2.21E21 d.2.21E-20 e.2.21 × 10-2
nekit [7.7K]

Answer:

221,000,000,000,000,000,000 = 2.21 x 10^20

therefore, the answer is b

Step-by-step explanation:

4 0
4 years ago
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(x-7) (-9) + (x-7) ( 4x+5)
Oksana_A [137]

Answer:

4x^2−32x+28

Step-by-step explanation:

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3 years ago
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pav-90 [236]

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45

Step-by-step explanation:

just had that q and sumbitted my quiziz and got it correct

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3 years ago
Write the equation 2x-5y=20 in slope intercept form
Zigmanuir [339]

Answer:

Step-by-step explanation:

2x-5y=20

Making y the subject

-5y = -2x + 20

Dividing by -5

y = -2/-5x + 20/-5

y = 2/5x - 4

So comparing with y = mx + c

Slope m = 2/5

Intercept c = -4

3 0
3 years ago
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