(for the two questions) A random sample of n = 4 scores is obtained from a normal population with= 20 and= 4.

What is the z-score associated with a sample meanxof 22?

• -1
• 2
• 0.5
• 1

Which of the following is an unbiased estimate for the population proportion of high school graduates in Honolulu?

• The number of high school graduates among a random sample of Honolulu residents
• The fraction of high school graduates among a random sample of Honolulu residents
• The fraction of high school graduates among a random sample of UH students
• The number of high school graduates among a random sample of UH students