Question

18) To assess the variation in measurement (in mL) of pre-filled vials containing Albuterol, 18) manufacturers select every 100th vial beginning at a random moment. Does this sampling plan result in a random sample? Simple random sample?

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Answer 1

18. To assess the variation in measurement (in mL) of pre-filled vials containing Albuterol, manufacturers select every 100th vial beginning at a random moment. Does this sampling plan result in a random sample? Simple random sampling.

Answer: No, the sampling plan used here is systematic sampling, not the simple random sampling.

Systematic sampling: In this type of sampling, the investigator first randomly selects the starting point from the population and then selects every n^th data point from the listing of the population.

Simple random sampling: In simple random sampling is the one in which each and every unit of the population has an equal chance of being included in the sample.

3) Determine whether the given values are from a nominal, ordinal, discrete, or continuous data set.

The mean number of hours that a sample of 50 adults undergo dental procedures is 2.3 hours.

Answer: Continuous because the value of this variable can take any possible value.

4) Determine whether the given values are from a nominal, ordinal, discrete, or continuous data set.

The number of caterpillars from a sample of 55 milkweed plants is 185.

Answer: Discrete because the value of this variable can take a finite number of values.