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Author Question: A school district administrator sent a survey to all teachers in the district. Only 30 of the ... (Read 479 times)

panfilo

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on: Jul 24, 2018
A school district administrator sent a survey to all teachers in the district. Only 30 of the teachers responded to the survey. Which of the following is true?
 
  I. The people that did not responded are likely to be similar to those that did so he should use them as the sample.
  II. This survey design suffered from non-response bias.
  III. Because he sent the survey to everyone, this is a census and the results can be applied to the whole population.
  A) II only
  B) I, II, and III
  C) I only
  D) I and II only
  E) II and III only

Question 2

Which is true about randomized experiments?
 
  I. Randomization reduces the effects of confounding variables.
  II. Random assignment of treatments allows results to be generalized to the larger population.
  III. Blocking can be used to reduce the within-treatment variability.
  A) III only B) I, II, and III C) I only D) I and III E) II only
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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Kjones0604

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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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panfilo

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Reply #2 on: Jul 24, 2018
Thank you!


Kjones0604

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Reply #3 on: Jul 24, 2018
Always glad to help...


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