Final

• Conditions required for a valid large-sample hypothesis test for μ:

  • A random sample is selected from the target population
  • The sample size "n" is large (>/= 30)
• Condition required for a valid small sample hypothesis test for μ:

  • A random sample is selected from the target population
  • The population from which the sample is selected has a distribution that is approx. normal
• Conditions required for a valid large sample hypothesis test for p:

  • A random sample is selected from a binomial population
  • The sample size "n" is large (np_0 >/= 15 & nq_0 >/=15)
• Conditions required for valid large sample inferences about (μ1 - μ2):

  • The two samples are randomly selected in an independent manner from the two target population
  • The sample sizes n1 and n2 are both large (>/= 30)
• Conditions required for valid small sample inferences about (μ1 - μ2):

  • The two samples are randomly selected in an independent manner from the two target population
  • Both sampled population have distribution that are approx. normal
  • The population variances are equal
• Conditions required for valid large sample inferences about μ_d:

  • A random sample of differences is selected from the target population of differences
  • The sample size n_d is large (>/= 30)
• Conditions required for a valid small sample inferences about μ_d:

  • A random sample of differences is selected from the target population of differences
  • The population of differences has a distribution that is approx. normal
• Conditions required for a valid large sample inferences about (p1 - p2):

  • The two samples are randomly selected in an independent manner from the two target populations
  • The sample sizes n1 and n2 are both large
• A country planning commission is attempted to survey 1500 households from the countries' 400,000 households. A random sample was selected and surveys were mailed to the randomly selected households, but only 1075 were returned. The inability to collect data from the 425 households that didn't return the survey would be considered which type of sampling problem?

  Nonresponse bias
• Because of the possible legal consequences, many people in a sample of the U.S. population chose not to participate in a survey regarding illegal drug use. What type of problem has occurred?

  Nonresponse bias
• Which is expressed in the same units as the original data, the variance or the standard deviation?

  Standard deviation
• True/False: The combinations rule applies to situations in which the experiment calls for selecting n elements from a total of N elements, without replacing each element before the next is selected.

  True
• Which of the following represents the difference in two population means? A) μ1 + μ2, B) p1 + p2, C) p1 - p2, D) μ1 - μ2

  D