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Grace [21]
3 years ago
10

Original cost: $7.50; markup %:50%

Mathematics
2 answers:
vagabundo [1.1K]3 years ago
6 0
You would pay $3.75
7.50÷2
aliya0001 [1]3 years ago
3 0
3.75 because 7.50 × .50 (or 7.50/2) is 3.75
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D - It is impossible to make a judgment with the given information.

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The fact that 1200 births were randomly selected and only 599 of such picks are girls does not give enough information on whether the birth is significantly high, low or neither. We must have other information to test for significance of the births proportion.

All we know is that;

Proportion of girls birth (p) = 599/1200 = 0.499. And by default, the proportion of male births (q) will be 1-p = 1-0.499 = 0.501.

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Having said this, we cannot really imply that, the number of girls is significantly high. Or the number of girls is neither significantly low nor significantly high. Or the number of girls is significantly low.

The best subjective submission will be that, <em>there is no significant difference between girls birth and males birth.</em> The question of high or low (an alternative hypothesis) requires some further statistical test and this question does not provide further details.

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