We are interested in conducting a study to determine the ...

[silviawilliams41]

We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor. What is the minimum sample size needed to estimate the population proportion with a margin of error of .05 or less at 95 confidence?
 a. 200.
   b. 100.
   c. 58.
   d. 385.

Question 2

Fifteen people were given two types of cereal, Brand X and Brand Y. Two people preferred Brand X and thirteen people preferred Brand Y. We want to determine whether or not customers prefer one brand over the other. To test the null hypothesis, the appropriate probability distribution to use is
 a. normal.
  b. chi-square.
  c. Poisson.
  d. binomial.

[ecox1012]

Answer to Question 1

d

Answer to Question 2

d

[silviawilliams41]

Excellent

[xthemafja]

Gracias!