The table shows number of hours spent in the sun weekly, x, and the the concentration of vitamin D3 in person's blood (in nanograms per milliliter), y. Which statements are correct?

A)1 hour of sunlight weekly yields about 29 ng/ml of D3.
B)2 hour of sunlight weekly yields about 36 ng/ml of D3.
C)9 hours of sunlight weekly yields about 68 ng/ml of D3.
D)The function y = 4.32x + 24.55 can be used to model the data.
E)The data shows the dependence of D3 concentration on hours in the sun.

B

Step-by-step explanation:

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.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation: