Author: Anonymous

A polling organization is investigating public opinion about cloning. They phone a random sample of 1200 adults, asking each person one of these questions (randomly chosen):A: “Do you favor allowing doctors to use cloned cells in attempts to find cures for such terrible diseases as Alzheimer’s, diabetes, and Parkinson’s?”B: “Should research scientists be allowed to use cloned human embryos in their experiments?”Which question do you expect will elicit greater support for cloning? Explain. What kind of bias is this? 

Which statement about bias is true?I. Bias results from random variation and will always be present.II. Bias results from a sampling method likely to produce samples that do not represent the population.III. Bias is usually reduced when sample size is larger. 

Height and weight Suppose that both height and weight of adult men can be described with Normal models, and that the correlation between these variables is 0.65. If a man’s height places him at the 60th percentile, at what percentile would you expect his weight to be? 

Which process produces alcohol or lactate? 

Does donating blood lower cholesterol levels? 50 volunteers have a cholesterol test, then donate blood, and then have another cholesterol test. Which aspect of experimental design is present? 

The membrane protein (enzyme) that transforms ADP + P to  ATP as H+ flows down a gradient from the intermembrane space into the matrix is:

In a covalent bond: 

A spherical shaped bacterial cell is considered:

A headline in the New York Times announced “Research shows running can alter one’s moods”. The article reported that researchers gave a Personality Assessment Test to 231 males who run at least 20 miles a week, and found “statistically significant personality differences between the runners and the male population as a whole.” Do you think the headline was appropriate? Explain. 

Among a dozen eggs, three are rotten. A cookie recipe calls for two eggs; they’ll be selected randomly from that dozen. Which simulation plan could be used to estimate the number of rotten eggs that might be chosen?  I. Let 0, 1, and 2 represent the rotten eggs, and 3, 4, …, 11 the good eggs. Generate two random numbers 0-11, ignoring repeats.II. Randomly generate a 0, 1, or 2 to represent the number of rotten eggs you get.III. Since 25% of the eggs are rotten, let 0 = rotten and 1, 2, 3 = good. Generate two random numbers 0-3 and see how may 0’s you get.