Question: A random sample of 50 households was selected for a telephone survey. The key question asked was, Do you or any member of your household own a cellular telephone with a built-in camera? Of the 50 respondents, 15 said yes and 35 said no.
a. Determine the sample proportion, p, of households with cellular telephones with built-in cameras.
b. If the population proportion is 0.40, determine the standard error of the proportion.