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risolatziyovudd
12.08.2019 •
Mathematics
The most common intelligence quotient (iq) scale is normally distributed with mean 100 and standard deviation 15. many school districts across the country seek to identify "gifted and talented" children for special enrichment programs. typically, these children must have iq scores in the top 5%. what is the minimum score to qualify a child for these programs?
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Ответ:
125
Step-by-step explanation:
Since we know that the IQ scale is normally distributed with mean = 100 and standard deviation 15. We can simply get z-score. A z-score of 1.645 which is a midpoint of z = 1.64 with 0.9495 and z = 1.65 with 0.9505 below that z-score will have 95% of all students below that value, therefore 5% above it will be (1.645)(15) + 100 = 124.675,the score is roughly to 125
Ответ:
Hello there!
The distances in group A are:
1, 1.5, 8, 9.2, 6.8, 4.5, 4.8, 2.5, 0.76
here you have 9 students.
then, the mean distance can be calculated as:
now, for group B, the distances are:
2, 2.5, 3.23, 1.3, 1.8, 2.4, 3, 1.5, 1.8
Also here we have 9 students, and the mean is:
Then, the comparation that you can make between the mean of bot groups is that the mean of A is bigger than the mean of B.
This means that the students in group B live, on average, closer to a school than the students of group A.