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LenKa [72]
3 years ago
12

Pleaseeee helpp answer correctly !!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
tatyana61 [14]3 years ago
4 0

Answer:

x = 59º

y = 40º

z = 59º

Step-by-step explanation:

x= 180 - 121 = 59º

59 + 40 + z = 180

       99 + z = 180

        z= 81º

y = 40º

x = 180 - (81 + 40)

x = 59

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What is the distance between point C and point D?
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B. 13 units

Step-by-step explanation:

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397 of 514 randomly selected U.S. adults interviewed said they would not be bothered if the National Security Agency collected r
Afina-wow [57]

Answer:

z=14.73

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for 99% confidence level the null hypothesis is rejected, thus majority of us adults would not bothered if the NSA collected personal records.

Step-by-step explanation:

H_{0}: Half of US adults would not bothered if the NSA collect records of personal telephone calls

H_{A}: Majority of the adults would not bothered if the NSA collect records of personal telephone calls

According to the sample, z-value can be found using the formula:

z=\frac{X-M}{\sqrt{n*p*(1-p)} } where

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  • M is the mean of the distribution of null hypothesis (257)
  • n is the sample size (514)
  • p is the proportion of the sample, who said they would not bothered ( \frac{397}{514} ≈ 0.77)

Putting these numbers in the formula,

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Since p<0.01,  for 99% confidence level we reject the null hypothesis, thus majority of us adults would not bothered if the NSA collected personal records.

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Answer:

if you help me

Step-by-step explanation:

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