Notebook + Quiz: Impact of Sample Size

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

QUIZ QUESTION::

Use the first statement in the notebook above to set up the null and alternative hypotheses.

ANSWER CHOICES:

Hypotheses	Statement
Null
Alternative

SOLUTION:

Hypotheses	Statement
Alternative
Null

QUIZ QUESTION::

Use the information from question 2 in the notebook to match each description to the correct value.

ANSWER CHOICES:

Description	Value
The population mean
The population standard deviation
The sample mean
The standard deviation of the sampling distribution for the mean of 5 values
The shape of the sampling distribution for the mean of 5 values

SOLUTION:

Description	Value
The shape of the sampling distribution for the mean of 5 values
The population mean
The population standard deviation
The sample mean
The standard deviation of the sampling distribution for the mean of 5 values

SOLUTION:

Greater than 0.50

SOLUTION:

We do not have statistically significant evidence to suggest the population mean is different from 67.60 inches. (Fail to reject the null)

QUIZ QUESTION::

Use your new sampling distribution to match each of the following values to the corresponding statement.

ANSWER CHOICES:

Description	Value
The p-value associated with your hypothesis test.
The conclusion for your hypothesis at alpha of 0.1 level.
The standard deviation of the sampling distribution for the mean of 300 draws.
The value of the sample mean used.

SOLUTION:

Description	Value
The standard deviation of the sampling distribution for the mean of 300 draws.
The p-value associated with your hypothesis test.
The value of the sample mean used.
The conclusion for your hypothesis at alpha of 0.1 level.
The value of the sample mean used.

SOLUTION:

Even the smallest of differences between a sample mean and a hypothesized population mean are significant when we have large sample sizes.