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likoan [24]
3 years ago
5

Each big square below represents one whole. What percent is represented by the shaded area?

Mathematics
1 answer:
kirza4 [7]3 years ago
5 0

Answer:

145%. The left one is 100% and then the right is the 45%.

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2 years ago
A survey was conducted that asked 1003 1003 people how many books they had read in the past year. results indicated that x overb
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The confidence interval is

10.5\pm1.35 = (9.15, 11.85).  This means that we can be 99% confident that the mean number of books people read lies between 9.15 and 11.85.

To find the confidence interval, we first find the z-score associated with it:

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Using a z-table (http://www.z-table.com) we see that this is associated with a z-score between 2.57 and 2.58.  Since both are equally far from this value we will use 2.575.

We calculate the margin of error using

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This means that the confidence interval is
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