A restaurant owner wants to know how often the customers in her restaurant eat out. Which sample will likely give the most reliable results?

A restaurant owner wants to know how often the customers in her restaurant eat out. Which sample will likely give the most reliable results?

Mr. Wynn gave the same test to his morning class and his afternoon class. Their scores are listed below: Morning class: 96, 76, 90, 88, 90, 93, 79, 80, 82, 86 Afternoon class: 70, 78, 80, 78, 86, 90, 76, 72, 70, 79 What is the mean of the morning class’ scores?

The students in Mr. Warnock’s class collected cans for recycling one week. Below is the data for each group. Group A:11, 9, 12, 14, 8, 7, 13, 15, 12, 9 Mean = 11 Group B: 18, 12, 26, 14, 9, 19, 21, 24, 15, 12 Mean = 17 What is the difference in the MAD between Group A and Group B?

There is a 20% chance that customers at a café will order pie. If the café has 420 customers this week, how many can be expected to not order pie?

Which survey would result in a biased sample?