A researcher studying malnutrition among children in a developing country collected weights of a ...

A researcher studying malnutrition among children in a developing country collected weights of
  a random sample of children using a scale that she had set to give weights 2.5 kilograms less
  than the actual weight.
 
  Which statement best describes this situation?
  A) Measurement error has occurred, and the researcher is guilty of unethical statistical
  practice.
  B) Measurement error has occurred, but the researcher is not guilty of unethical statistical
  practice.
  C) Measurement error has not occurred, and the researcher is not guilty of unethical
  statistical practice.
  D) Measurement error has not occurred, but the researcher is guilty of unethical statistical
  practice.

Q. 2

Find a value of the standard normal random variable z, called z0, such that P(z  z0 ) = 0.70.
 
  A) -.47 B) -.98 C) -.53 D) -.81

Q. 3

A health food company has the following statement on their new product packaging:
  Prevents all types of cancer (Fact: Past studies have shown that some ingredients in
  the new product have been know to possibly reduce the risk of many types
 
  cancer).
  Discuss why it is unethical to make this statement.

Q. 4

Find a value of the standard normal random variable z, called z0, such that P(-z0  z  z0 ) = 0.98.
 
  A) 2.33 B) 1.96 C) .99 D) 1.645