A survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales tax from 5% to 6%, with the additional revenue going to education. Let ^ p denote the proportion in the sample who say they support the increase. Suppose that 34% of all adults in Ohio support the increase. The standard deviation of the sampling distribution is

The standard deviation of the sampling distribution is 0.0122 = 1.22%

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean and standard deviation .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean and standard deviation

A survey asks a random sample of 1500 adults in Ohio

This means that

34% of all adults in Ohio support the increase.

This means that

The standard deviation of the sampling distribution is

The standard deviation of the sampling distribution is 0.0122 = 1.22%

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