Errors

Q.

What are the different sampling methods?

Q. Fill in the blank with a suitable option:
The author of the passage would most likely consider the information in chart 1 to be ____________.

1. possibly accurate but too crude to be truly informative
2. compelling but lacking in historical information
3. representative of a perspective with which the author disagrees
4. excellent evidence for the arguments made in the passage

Q. A computer accessories manufacturing firm wants to make a detachable keyboard and for that, it conducts a survey to conclude the factor of maximum importance. The manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. Which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preference for a detachable keyboard?

1. One week is likely not enough time to get a large enough sample
2. Most people won't bother to send in the survey, which is likely to skew the results
3. There is no way to verify whether the responders to the survey actually own a tablet.
4. The survey is biased because it was conducted through an electronics store, not the general population

Q.

You want to estimate the number of eighth-grade students in your school who find it relaxing to listen to music. You consider two samples.

• Fifteen randomly selected members of the band
• Every fifth student whose name appears on an alphabetical list of eighth-grade students
  which sample is unbiased? Explain.