Notebook + Quiz: Building Confidence Intervals

Confidence Intervals for the Population Mean

In the previous video, you saw how we could build a confidence interval for the population mean. To get some practice, you will do the same process to create a confidence interval for the population mean height of non-coffee drinkers. Additionally, there are some quiz questions available below the python notebook to assure your results are accurate.

Code

If you need a code on the https://github.com/udacity.

QUIZ QUESTION::

Question 1

Use the results for the first two questions to match the following descriptions to the correct values.

ANSWER CHOICES:

Description	Value
Proportion of sample that drinks coffee
Proportion of sample that does not drink coffee
Average height for sample members that drink coffee
Average height for sample members that do not drink coffee

SOLUTION:

Description	Value
Proportion of sample that does not drink coffee
Average height for sample members that drink coffee
Average height for sample members that do not drink coffee
Proportion of sample that drinks coffee

SOLUTION:

No

QUIZ QUESTION::

Question 3

Use your answers to the final questions in the notebook to match each value to its corresponding description.

ANSWER CHOICES:

Description	Value
What is the lower bound of your 95% confidence interval for the mean height of those who do not drink coffee in your population?
What is the upper bound of your 95% confidence interval for the mean height of those who do not drink coffee in your population?
What is the value for the mean height of those who do not drink coffee in your population?
Did your interval capture the true mean height for the non-coffee drinkers?
Was the sample mean height for non-coffee drinkers the same as the population mean height for non-coffee drinkers?

SOLUTION:

Description	Value
Did your interval capture the true mean height for the non-coffee drinkers?
What is the upper bound of your 95% confidence interval for the mean height of those who do not drink coffee in your population?
What is the value for the mean height of those who do not drink coffee in your population?
Was the sample mean height for non-coffee drinkers the same as the population mean height for non-coffee drinkers?
Did your interval capture the true mean height for the non-coffee drinkers?
What is the lower bound of your 95% confidence interval for the mean height of those who do not drink coffee in your population?
Was the sample mean height for non-coffee drinkers the same as the population mean height for non-coffee drinkers?

SOLUTION:

1%