a large company (2,000 employees) wants to find out what team-building activity its employees prefer. Which of the following samples can give the most valid generalization?
A. a group with one member from each department
B. 400 randomly chosen employees from the list of all employees
C. all employees who have worked in the company for 5 years or more
D. all 624 female employees In the company
B. 400 randomly chosen employees from the list of all employees
This sample is the most likely to provide a valid generalization because it includes a diverse representation of employees from across the company. This will help ensure that the preferences of different departments, levels of experience, and demographics are taken into account.
A local video game store randomly surveyed 80 customers that visited last month about the type of video game they bought. the manager finds that 3 customers bought racing games. if there are 345 customers that visited that month, approximatley how many of them bought racing games?
To estimate how many of the 345 customers bought racing games based on the sample of 80 customers surveyed, we can set up a proportion.
Let x be the estimated number of customers that bought racing games out of the 345 total customers.
We know that 3 customers bought racing games out of the 80 surveyed customers, so we can set up the proportion:
3/80 = x/345
To solve for x, first, cross multiply:
80x = 3 * 345
80x = 1035
Next, divide both sides by 80 to solve for x:
x = 1035 / 80
x ≈ 12.94
Therefore, approximately 13 out of the 345 customers are estimated to have bought racing games.