Statistics Unit 10 Review

These flashcards cover key concepts from Unit 10 of the statistics lecture notes, focusing on confidence intervals, sampling procedures, and evaluation of statistical tests.

What are the three types of procedures for confidence intervals

One sample t interval for M, two sample t interval for M1-M2, one sample t interval for M difference.

What is the 10% condition for sample size?

n < 0.10N or n = 0.10N.

What are the four steps in the 4c method for constructing an interval?

Choose, Check, Calculate, Conclude.

When concluding a confidence interval, how should the statement be framed?

We are BLANK % confident that the interval from BLANK to BLANK captures the true PARAMETER.

What is the general formula for a one sample confidence interval?

Mean +/- Critical value (standard error).

What is the standard error formula for a one sample?

s/ square root of n

What is the critical value for means in confidence intervals?

t*.

What do we use for finding the critical value t*?

Table B.

What is the formula for degrees of freedom (df) in a one sample t-test?

n - 1.

How do you evaluate a confidence interval with (+,+)?

Convincing evidence that the 1st mean is GREATER.

How do you evaluate a confidence interval with (-,-)?

Convincing evidence that the 1st mean is less.

What distinguishes a two sample t interval from matched pairs?

In matched pairs, each group gets both treatments/has one measurement; in two samples, each group gets a different treatment/has separate measurements.

Why is it appropriate to use a two sample t interval for M1-M2?

The data was collected from 2 independent samples rather than one paired sample.