25. Which of the following is an example of convenience sampling? Susie surveys each customer walking out of Walmart about their political views. Farmer Joe separates his farm into 10 regions. He then randomly selected 5 trees from each region to estimate the number of apples produced on his apple tree farm. Leroy uses a random number generator to select 25 freshmen, 25 sophomores, 25 juniors, and 25 seniors to survey. all of the above are examples of convenience sampling

Last year 46% of business owners gave a holiday gift to their employees.  A survey of business owners conducted this year indicated that 35% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners.  How many business owners in the survey plan to provide a holiday gift to their employees this year?

Does the location of your seat in a classroom play a role in attendance or grade? 1600 students in a physics course were randomly assigned to one of four groups. The 400 students in group 1 sat 0 to 4 meters from the front of the class, the 400 students in group 2 sat 4 to 6.5 meters from the front, the 400 students in group 3 sat 6.5 to 9 meters from the front, and the 400 students in group 4 sat 9 to 12 meters from the front. Complete parts (a) through (c). Click the icon to view the chi-square table of critical values. (a) For the first half of the semester, the attendance for the whole class averaged 83%. So, if there is no effect due to seat location, we would expect 83% of students in each group to attend. The data show the attendance history for each group. How many students in each group attended, on average? Is there a significant difference among the groups in attendance patterns? 3 4 Group Attendance 1 0.84 0.84 0.84 0.80 The number of students who attended in the first…

A small shop owner wants to see how much people are spending at her store, so she numbers all the receipts from the past week and uses a computer program to generate a list of 20 random numbers.  She samples the receipts that correspond to those numbers. What type of sample was taken?     convenience sample     simple random sample     systematic sample     cluster sample     quota sample     voluntary response sample