__________ is a condition applied to the experimental units involved in an experiment.
A) The sampling design B) The factor level
C) The design D) A treatment
Q. 2The number of violent crimes committed in a city on a given day in a random sample of 140 days is a __________ random variable.
A) discrete B) continuous
Q. 3A manufacturer of kitchen utensils wishes to estimate the proportion of left handed people in the population. Obtain a sample size that will ensure a margin of error of at most 0.047 for a 96 confidence interval.
A) 1903 B) 23 C) 11 D) 476
Q. 4A public health researcher wishes to estimate the proportion of adults in the U.S. that have high blood pressure. Obtain a sample size that will ensure a margin of error of at most 0.006 for a 92 confidence interval.
A) 73 B) 21,268 C) 128 D) 85,070
Q. 5The object upon which the response variable is measured is called ________ .
A) the predictor variable B) a treatment
C) the factor D) an experimental unit
Q. 6A small computing center has found that the number of jobs submitted per day to its computers has a distribution that is approximately bell shaped, with a mean of 77 jobs and a standard deviation of 11.
Where do we expect most (approximately 95) of the distribution to fall?
A) between 66 and 88 jobs per day B) between 55 and 99 jobs per day
C) between 44 and 110 jobs per day D) between 55 and 110 jobs per day
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