Standard Deviation of Sampling Proportion

Sigma of P-Hat

• Population Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Means

• Sample Percents of the Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Proportions

What does this formula do?

• Calculates Standard Deviation for Sampling Dist. of Sample Means

• Checks if the samples are independent

• Checks Normality

• Calculates Standard Deviation for Sampling Dist. of Sample Proportions

What does this formula do?

• Calculates Standard Deviation

• Checks if the samples are independent

• Checks Normality

• Calculates Probabilitie

When sampling from a population with proportion p, the sample outcomes will vary.  Which of the following represents the standard deviation of the sampling distribution?

• p

Your mail-order company advertises that it ships 90% of its orders within three working days. You select an SRS of 100 of the 5000 orders received in the past week for an audit.

What is the standard deviation?

• 0.04

• 0.004

• 0.3

• 0.03

A realtor has been told that 43% of homeowners in a city prefer to have a finished basement. She surveys a group of 300 homeowners randomly chosen from her client list. Describe the sampling distribution model of the proportion of homeowners in this sample who prefer a finished basement.

• mean = 43%; standard deviation = 1.4%

• mean = 57%; standard deviation = 2.9%

• mean = 57%; standard deviation = 1.4%

• mean = 43%; standard deviation = 2.9%

• There is not enough information to describe the distribution.

What is the standard deviation of the distribution?

• 1010

• 20

• 60

• √20

What does the symbol represent?

• proportion from a sample

• proportion from a population

• standard deviation of the sampling distribution of sample proportions

• mean of the sampling distribution of sample proportions

• standard deviation from a population