Chapter 20: Inference about a population mean

Question 1

When the standard deviation of a statistic is estimated from data, the result is called the ___________ of the statistic.

Answer 1

standard error

Question 2

how to find the standard error (fka standard deviation) of a sample mean

Answer 2

s / √n

Question 3

how to find the one sample t-statistic (when you are using the error statistic to find the standard deviation)

Answer 3

Question 4

degrees of freedom

Question 5

The one-sample t Confidence interval

Answer 5

To analyze samples from Normal populations with unknown σ, just replace the standard deviation σ/√n of x-bar by its standard error s/√n in the z procedures, then a level C confidence interval is this formula…

Question 6

SE_x̄

Answer 6

Standard error

Question 7

The one-sample t confidence interval has the form:

Answer 7

Question 8

matched pairs t-procedures

Answer 8

To compare the responses to the two treatments in a matched pairs design, find the difference between the responses within each pair. Then apply the one-sample t procedures to these differences.