Answer:
c. The parameter of interest is μ1-μ2, the difference in the mean sale price of all black cars sold at used car auctions and the mean sale price of all white cars sold at used car auctions
Step-by-step explanation:
Of interest is to estimate the difference in the mean sale price of all black cars sold at used car auctions and the mean sale price of all white cars sold at used car auctions.
The parameter of interest is the difference. Suppose we have that is the mean sale price of all black cars sold at used car auctions, while is the the mean sale price of all white cars sold at used car auctions. Since the parameter of interest is the difference, it is , and the correct answer is given by option c.
Answer:
As far as i know you should go for LCM that would be more convenient and easy to do
-6n-20=-2n+4-12n
-6n-20=-14n+4
+6n +6n
-20=-8n+4
-4 -4
-24=-8n
/8 /8
n=-3
-
Step-by-step explanation:
Given that,
The side of a square field = 70 m
The dimensions of a rectangular field with length 90m and breadth 60m.
The distance covered by the person on square field is given by :
P = 4×side
= 4×70
= 140 m
The distance covered by the person on a rectangular field is given by :
P = 2(l+b)
= 2(90+60)
= 2×150
= 300 m
Hence, a person will cover more distance in the rectangular field.