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Author Question: A Columbia University study linked soda consumption to behavior problems in children. Researchers ... (Read 177 times)

bb

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on: Jul 24, 2018
A Columbia University study linked soda consumption to behavior problems in children. Researchers examined data from a previous study that followed 2929 mother-child pairs.
 
  One survey asked about behaviors of the child and also about soda consumption. They found that the more soda the kids drank, the more behavior problems they had. What aspect of a well-designed experiment is absent from this study?
  A) a control group
  B) randomization
  C) blinding
  D) a placebo
  E) all of these

Question 2

In an experiment the primary purpose of blocking is to
 
  A) reduce the within-treatment variation.
  B) reduce the between-treatment variation.
  C) eliminate the need for random assignment of treatments.
  D) eliminate confounding variables.
  E) reduce bias.
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nekcihc358

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Reply #1 on: Jul 24, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bb

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Reply 2 on: Jul 24, 2018
Gracias!

nguyenhoanhat

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Reply 3 on: Yesterday
Excellent

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