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AysviL [449]
2 years ago
11

You want to be able to estimate the average IQ of people in Winston-Salem. You would be satisfied knowing the average IQ plus-or

-minus 5IQ points(using a 90% confidence interval). The standard deviation for IQ tests is typically 15 points; so you’ll use that as a guideline. How many people would you need to survey in order to be able to estimate the average to your desired degree of accuracy?
Social Studies
1 answer:
Savatey [412]2 years ago
4 0

Answer:

Sample size = n =25

Explanation:

standard deviation =s = \sigma =15

Margin of error = E = 5 At 90%

confidence level = 1 - 90% = 1 - 0.90 =0.10 /2 = 0.05

Z /2 = Z0.05 = 1.645

sample size n = [Z\alpha/2* \sigma / E] 2 n = ( 1.645*15 / 5)2 n =24.35

Sample size = n =25

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A competent therapist remains ___________ in the counseling process while maintaining openness about ___________.​ a. aware/beha
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2 years ago
Read the text of "The Gymnast" again and write an inference of your own that can be supported by textual evidence.
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2.)I can infer that she is doing a performance because it says, " she spins, through the air, lands on the mat, rolls, springs" These are things that gymnast  do in their performances.

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cognitions.                                    

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