Interactive practice questions
In Italy, $37%$37% of Italians also speak English. If a sample of $200$200 Italians in Italy are selected at random, determine:
The expected number in the sample who speak English.
The expected sample proportion of English speakers.
The standard deviation of the sample proportions of English speakers.
Round your answer to three decimal places.
$15%$15% of all customers at a book store bought at least one autobiography. In a random sample of $100$100 customers, determine:
On any day of the year, approximately $42000$42000 of the $400000$400000 people residing in the city of Florence are tourists. Determine, in a random sample of $600$600 people:
A social media advertising campaign gets an average of $150$150 follows per $1000$1000 users who see the advertisement.