quiz interp

Confidence Interval

We are ______% confident that the interval from — to —captures the true [parameter in context]

Confidence Level

In repeated sampling of size [n] about % of all intervals calculated will capture the true [in context].

P-value

If [the null is true in context] the probability of getting a sample where [sample results in context] or [more extreme] purely by chance is —

Because our p-value is less than alpha…

…we reject the null. There is sufficient evidence to conclude that [state Ha in context/answer the question].

Because our p-value is greater than alpha…

…we fail to reject the null. There is not sufficient evidence to conclude that [state Ha in context/answer the question].

Type I Error

Definition: We reject the null when it's actually true. Describe: This could mean we made a change that was unnecessary or ineffective. [in context] Consequence: [Describe a consequence in context.]

Type II Error

Definition: We fail to reject the null when it's actually false. Describe: This could mean we failed to make a change that was necessary. [in context] Consequence: [Describe a consequence in context.

Power

The probability of rejecting the null hypothesis