Final answer:
The sample proportion (p^) is calculated by dividing the number of people with the characteristic of interest by the total sample size. In this case, p^ equals 13 divided by 66, resulting in a sample proportion (p^) of 0.1970.
Step-by-step explanation:
The student appears to be asking about calculating the sample proportion (p^) from a statistic related to the subject of probability and statistics. The sample proportion is found by dividing the number of people with the characteristic of interest by the total sample size. Assuming that the '13' mentioned in the question refers to the number of cranky people found in the sample, we calculate the value of p^ (the sample proportion) by dividing 13 by 66, the sample size (n).
p^ = 13 / 66
To express this as a decimal to four decimal places, we have:
p^ = 0.1970