In estimating the standard deviation in the population for the ...

[Sufayan.ah]

In estimating the standard deviation in the population for the formula for calculating the sample size for estimating a mean, we can use some prior knowledge about the
 a. sample to estimate our standard deviation.
  b. population, undertake a pilot study or estimate the range, and divide by 10.
  c. population, undertake a pilot study or estimate the range, and divide by 6.
  d. Either of the two; b or c would work.
  e. None of the above; if you do not have the actual standard deviation, you cannot use the formula.

Question 2

Which of the following statements is most accurate regarding the relationship between sample size and the sample representativeness?
 a. There is no relation between the size of a sample and the representativeness of the population from which it is drawn.
  b. There is a strong positive relationship between the size of a sample and the representativeness of the population from which it is drawn.
  c. You cannot have a representative sample unless the sample size is equal to or exceeds ten percent of the population.
  d. Sample size determines representativeness but only if the sample plan is a probability sampling plan.
  e. None of the above.

[shoemake]

Answer to Question 1

C

Answer to Question 2

a

[Sufayan.ah]

Excellent

[pratush dev]

Gracias!