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? (1 point)
Responses
a group with one member from each department
a group with one member from each department
400 randomly chosen employees from the list of all employees
400 randomly chosen employees from the list of all employees
all employees who have worked in the company for 5 years or more
all employees who have worked in the company for 5 years or more
all 624 female employees in the company
400 randomly chosen employees from the list of all employees
A hotel maintenance crew wants to estimate how many of the 12,000 lamps in their 30-story hotel need a new lightbulb. Which of the following is a random sample of lamps to be inspected?(1 point)
Responses
100 lamps on each floor chosen randomly
100 lamps on each floor chosen randomly
400 lamps on the first 10 floors
400 lamps on the first 10 floors
all lamps in booked rooms
all lamps in booked rooms
all lamps from the rooms with king-sized beds
all lamps from the rooms with king-sized beds
100 lamps on each floor chosen randomly
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, approximately how many of them bought racing games?(1 point)
___customers
To estimate the number of customers who bought racing games, we can set up a proportion based on the information provided in the random sample.
3 out of 80 customers bought racing games.
Let x represent the number of customers who bought racing games out of the total 345 customers.
The proportion can be set up as:
3/80 = x/345
Cross-multiplying, we get:
80x = 3 * 345
80x = 1035
x = 1035 / 80
x ≈ 12.9375
Rounded to the nearest whole number, approximately 13 customers out of the 345 bought racing games.