Answer to Question #248578 in Statistics and Probability for sindy

Question

A survey was conducted of 140 buyers of new BMW 3-series cars, 140 buyers of new BMW 5-series cars, and 140 buyers of new BMW 7-series cars. In it, the buyers were asked the age they were when they purchased the car. The box plots below display the results

Answer 1

Which of the following statements is false?

a) All the buyers of the 7-series cars were 35 years or older.

True.

b) Less than half of the buyers of the 3-series car were over 35 years or older.

True.

c) It can be deduced that the average age of buyers of the 3-series cars is smaller than that of buyers of the 7-series cars.

True.

d) 25% of the 7-series buyers were older than all the 3-series buyers.

False.

e) One hundred and five (105) 3-series buyers were from 25 to 40 years old.

$$\dfrac{105}{140}\cdot100\%=75\%$$

True.