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MatroZZZ [7]
3 years ago
8

Andy and Elizabeth each rounded 2,639,456 to the nearest ten-thousand. Andy got 2,640,000. Elizabeth got 2,630,000. who is corre

ct? explain the error that was made.
Mathematics
2 answers:
Alex3 years ago
7 0
Andy is right, because is 39 closer to 40 or 30? 
Of course 40, so that is why Andy is right.
atroni [7]3 years ago
6 0
2,640,000. Because the 4 is in the ten thousands place and should be rounded up
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Answer:

C. H0 : p = 0.8 H 1 : p ≠ 0.8

The test is:_____.

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Step-by-step explanation:

We formulate null and alternative hypotheses as  proportion of people who own cats is significantly different than 80%.

H0 : p = 0.8 H 1 : p ≠ 0.8

The alternative hypothesis H1 is that the 80% of the  proportion is different and null hypothesis is , it is same.

For a two tailed test for significance level = 0.2 we have critical value  ± 1.28.

We have alpha equal to 0.2  for a two tailed test . We divided alpha with 2 to get the answer for a two tailed test. When divided by two it gives 0.1 and the corresponding value is ± 1.28

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n= 200

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0.8 ± 1.28 \sqrt{\frac{0.8*0.2}{200} }

0.8 ± 0.03620

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