Ap stat test chapter 18-20

If confidence level increases what happens to z

• Increases

• decreases

If confidence level increases what happens to margin of error

• increases

• Decreases

If level of confidence increases what happens to sample size

• Inc

• Dec

• No effect

If the confidence level increases what happens to size of interval

• Inc

• No effect

• Dec

If confidence level increases what happens to standard error

• Inc

• Dec

• No effect

If sample size decreases what has no effect

• Z

• Margin of error

• Sample size

• Size of interval

If sample size decreases what increases

• Margin of error

• Sample size

• Size of interval, standard error, Margin of error

• Size of interval, sample size, standard error, and margin of error

By doing what will create a smaller margin of error without losing any confidence

• Change z

• Take a smaller sample

• Take a smaller sample and change z

• change z and take a larger sample

P value indicates what

• The probability of observing statistic given the null hypothesis is true

• The probability of observing statistics given that the alternative hypothesis is true

• The probability of observing statistics given that the alternative hypothesis is true

• The probability that the no hypothesis is true

When are people values negative

• Never

• Always

• Sometimes

• None