Q 3.9: Two journalists, Judy and Mark, sample n=100n=100 people many times asking each bypasser about the rating of the mayor. Judy takes many random samples of 100 people in the whole city, while Mark takes many samples of 100 people by asking bypassers in the central street. The sampling distributions generated by Mark and Judy are different. Which set of the sample means is not representative of the population of the city? What conclusion can be done?

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.

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.

where are the images of the functions i can only see the question you typed.

step-by-step explanation: