There are 559 full-service restaurants in Delaware. The mean number of seats per restaurant is 99.2. [Source: Data based on the 2002 Economic Census from the US Census Bureau.]Suppose that the true population mean = 99.2 and standard deviation = 21 are unknown to the Delaware tourism board. They select a simple random sample of 50 full-service restaurants located within the state to estimate . The mean number of seats per restaurant in the sample is M = 103.4, with a sample standard deviation of s = 18.2.

The standard deviation of the distribution of sample means (that is, the standard error, MM) is . (Note: Although and are unknown to the Delaware tourism board, they are known to you for the purposes of calculating these answers.)

The standard or typical average difference between the mean number of seats in the 559 full-service restaurants in Delaware ( = 99.2) and one randomly selected full-service restaurant in Delaware is .

The standard or typical average difference between the mean number of seats in the sample of 50 restaurants (M = 103.4) and onerandomly selected restaurant in that sampleis .

The standard or typical average difference between the mean number of seats in the 559 full-service restaurants in Delaware (=99.2) and the sample meanof any sample of size 50 is .

The z-score that locates the mean number of seats in the Delaware tourism board's sample (M = 103.4) in the distribution of sample means is .