Answer:
1st, 3rd and 5th statements are true.
Step-by-step explanation:
We have been given a table that hows the number of cars sold each month for 5 months at two dealerships. We are asked to choose the correct statement from the given choices.
1. The mean number of cars sold in a month is the same at both dealerships.
Let us find mean sales for both dealerships.
We can see that mean number of cars sold at both dealerships, therefore, statement 1st is true.
2. The median number of cars sold in a month is the same at both dealerships.
Let us arrange our given data set from least to greatest.
Median sales for Admiral autos: 4, 10, 15, 17, 19.
As our data set have 5 data points, therefore, the median will be the value of 3rd data point that is 15.
Median sales for Countywide Cars: 9, 10, 14, 15, 17.
As our data set have 5 data points, therefore, the median will be the value of 3rd data point that is 14.
Since the median number of cars sold at both dealerships is different, therefore, 2nd statement is false.
3. The total number of cars sold is the same at both dealerships.
We have already seen that both dealerships sold 65 cars, therefore, 3rd statement is true.
4. The range of the number of cars sold is the same for both dealerships.
Since the ranges of both dealerships are different, therefore, 4th statement is false.
5. The data for Admiral Autos shows greater variability.
Let us find standard deviation of both data sets.
Since SD for Admiral Autos is 6.04 and SD for Countywide Cars is 3.39, therefore, 5th statement is true indeed.
Hope this helps!
.
, we use the formula:
and 
:
(the y-intercept) is the value of 
when 
, which is 25.
(choice A).