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incoming freshmen and graduating seniors

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Question

Researchers are comparing the intelligence levels of incoming freshmen and graduating seniors. Assuming that there

is not a systematic difference in intelligence levels between the two groups and researchers reject the null hypothesis, they have committed:

a) Type 3 error

b) Type I error

c) Type II error

d) no error

 
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z= (20-30)/10z= -1p(z< -1) = 0.1587 = 15.87% I am stuck after I calculate z= -1

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Question

z= (20-30)/10z= -1p(z< -1) = 0.1587 = 15.87% I am stuck after I calculate z= -1 I do not know

what to do to get 0.1587. Can you explain that step.

 
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Hello can you help explain the next step

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Question

Hello can you help explain the next step. (10-30)/10 = -20/10 = -2  Z= (50-30)/10 = 20/10 = 2. I am stuck after

this point. I need to find the difference between 1- and 50. Thank you.

 
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Enrich program

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Question

What are two variables than can be operationalized and measured using the Prepare/Enrich program?

 
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