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Nat2105 [25]
3 years ago
14

The American Academy of Periodontology released a survey, revealing that 27% of US adults admit they lie to their dentist about

how often they floss their teeth. Periodontist Dr. Garcia believes that the percentage seems low, so he decides to conduct his own hypothesis test to determine the true proportion. What should he write as the null and alternative hypotheses for this situation?
Answer Options:
A: H0: p = 0.27; Ha: p > 0.27

B: H0: p = 0.27; Ha: p < 0.27

C: H0: p = 0.27; Ha: p ≠ 0.27

D: H0: μ = 0.27; Ha: μ > 0.27

E: H0: μ = 0.27; Ha: μ < 0.27
Mathematics
1 answer:
Y_Kistochka [10]3 years ago
5 0

Answer:

A: H0: p = 0.27; Ha: p > 0.27

Step-by-step explanation:

The parameter is the population proportion.

According to the survey conducted by the American Academy of Periodontology, the proportion of of US adults who admit they lie to their dentist about how often they floss their teeth is 27%.

This means the null hypothesis is :

H_0: p=0.27

Periodontist Dr. Garcia believes that the percentage seems low, so his claim is that the percentage should be more than 27%.

This means, the alternate hypothesis is

H_{a}:p \: > \: 0.27

Therefore the correct choice is A.

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Step-by-step explanation:

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8 0
3 years ago
Val needs to find the area enclosed by the figure. The figure is made by attaching semicircles to each side of a 58​-by-58 squar
Savatey [412]

Answer:

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Now, each of the semicircles has a diameter of 58m, and we have that the area of a circle is equal to:

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And the area of a semicircle is half of that, so the area of each semicircle is:

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And we have 4 of those, so the total area of the semicircles is:

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3 years ago
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ddd [48]

Answer:

66

Step-by-step explanation:

Add what is in the parenthesis, in this case 7+4:

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Multiply 11 by 6:

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hope this helps :)

5 0
3 years ago
Read 2 more answers
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