Suppose you send out 350 surveys to random sample of all past customers (your target population) asking them to report their level of satisfaction with your product. Of the 350, you used the 112 that responded to the survey to construct a confidence interval for the population "satisfaction score." What might be a potential problem with this confidence interval?
A. There is likely to be skewness in the sample.
B. Predictable-world bias
C. Satisfaction scores are inherently variable.
D. The sample you're using is not a random sample from the target population.
Answer: D
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Which of the following statements regarding DNA replication is true?
A) Bacterial replication is faster than eukaryotic replication. B) DNA replication during embryonic development occurs at a slower rate than in the early stages of neonatal life. C) Early-replicating genes are those that are not actively transcribed. D) The rate of DNA replication is constant at all stages of development in eukaryotes. E) Cyclin-dependent kinases (Cdk) are not involved in the DNA replication process.
A person who is 46, XX is a
A) chromosomally normal female. B) chromosomally abnormal female. C) chromosomally normal male. D) chromosomally abnormal male.
In prokaryotes, the genes for metabolic pathways are
a. always on for early steps in the pathway, but genes for later steps are generally off. b. always on so the bacteria can respond rapidly to changing conditions. c. turned on and off as conditions change. d. independently regulated. e. expressed in low levels all of the time, but will be expressed in higher levels when conditions warrant.
Which prokaryotic nutritional group uses CO2 and inorganic substances to produce energy?
a. photoautotrophs b. chemoautotrophs c. photoheterotrophs d. chemoheterotrophs e. methanoheterotrophs