Raoul measured the height of 12 different plants in his garden in April. He measured them again in June. April Heights (in inches)
June Heights (in inches)
12
15
23
11
42
45
44
39
12
19
20
12
45
45
40
43
11
14
12
13
41
40
45
41
What is the difference between the mean height in April and the mean height in June?

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.

current in the circuit at time t is /, then the power delivered to the resistor is

step-by-step explanation: