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dangina [55]
4 years ago
13

the museum has a collection of 139 skulls on display in nine rows. in the first row, 2/11 of the skulls on display came from fem

ales. there are 22 skulls in the first row. how many are from females?
Mathematics
1 answer:
lbvjy [14]4 years ago
8 0
4 skulls on display come from females
2/11 = x/22
Times 11 and 2 by two
4/22
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Answer:

The sample  size is  n =68

Step-by-step explanation:

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From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90 ) \%

=>   \alpha = 0.10

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>  n = [\frac{1.645 }{0.1} ]^2 * 0.50  (1 - 0.50 )

=>  n =68

     

6 0
3 years ago
Sarah bought 3 pairs of joggers and a pair of tennis shoes. The tennis shoes cost $105. The total cost of her purchase was $180.
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$25.00

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3 years ago
30% of Number A is the same as 40% of Number B.
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30% of number A means

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4 years ago
....................
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The answer is (A), or 8.

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3 years ago
Read 2 more answers
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