Proportions or Means Inference

Conduct a test to determine whether or not the population proportion of voters in favor of proposal A is greater than 50%. In a random sample of 200 voters, 140 said that they were in favor of this proposal. Compute the test statistic.

• z = 6.17

• z = 5.66

• z = 19.80

• None of the above

If no p-hat value is given, what should you assume p-hat equals?

• 0.01

• 0.05

• 0.10

• 0.5

Which of the following hypotheses is a valid example of a 1-tailed test?

• Ho: p = 0.3, Ha: p > 0.4

• Ho: p = 0.3, Ha: p ≠ 0.3

• Ho: p^ = 0.3, Ha: p^ > 0.3

• Ho: p = 0.3, Ha: p > 0.3

A confidence interval estimate is determined from the summer earnings of a SRS of n students. All other things being equal, which of the following will result in a smaller margin of error?

• A greater confidence level

• A larger sample standard deviation

• A larger sample size

• Introducing bias into sampling

The process of drawing conclusions using valid data from samples and making generalizations about a population.

• Validity

• Random Sample

• Sample

• Inferential Statistic

Select the correct description

• Average Percent

• Population Proportion

• Sample Proportion

• Percent Slope of a Distribution

Statistics which is concerned with a higher order of critical thinking and judgment.

• Descriptive

• Inferential

• Parametric

• Non Parametric

The symbol for the sample proportion is __________.

• Z_c

• p̂

• E

• q

Match the following

• n

• The number of individuals in the sample with the specific trait

• x

• The Sample Proportion

• p̂

• The population proportion

• p

• The Sample Size

The symbol for the sample proportion is __________.

• z*

• p̂

• E

• p