Answer:
a number produced from a subset of the group of interest.
Step-by-step explanation:
This problems is, basically, about the difference of concepts between a statistic and a parameter.
When something is taken from a sample and estimated to the entire population, it is a statistic. For example, if you survey 200 Central New York residents, an 60% of them say they are Buffalo Bills fans, the 60% is a statistic.
When something is true to the entire population, it is a parameter. If i study the voting preference of all 53 players on the Buffalo Bills active roster, and 83% are Democrats, the 83% is an parameter.
So the correct answer is:
a number produced from a subset of the group of interest.
This subset is the sample, for example, and the group of interest is the population.
Answer:
12.83
Step-by-step explanation:
S = 12.091
N = 12
We must find the 12th point, X
The formula of S² (variance) as a function of µ (media) is as follows:
S² = (1/N Ʃ Xi²) - µ²
S² = 146.2
Multiplying both members by N,
N S² = Ʃ Xi² – N µ²
On the other hand,
µ = (25 + 41 + 49 + 25 + 30 + 13 + 31 + 34 + 27 + 54 + 38 + X) / 12
µ = (367 + X) / 12
Replacing,
12 x 146.2 = 13607 + X² – 12 (367 + X)² / 144
1754.4 = 13607 + X² – 0.0833 (134689 + 734 X + X²)
1754.4 = 13607 + X² – 11219.5 – 61.14 X – 0.0833 X²
0.92 X² – 61.14 X + 633.1 = 0
This is solved by finding the two values of X that satisfy the equation.
The solution requires solving the quadratic formula,
X12 = (-b ± √(b² - 4ac)) / 2a
The values are:
X1 = 12.83
X2 = 53.62
Since we know that the value is 25 or less, the answer is 12.83
Answer: (0, 3)
Step-by-step explanation:
The y-intercept of the line is where the line intercepts the y-axis. In other words, the coordinate value of the line when x is 0.
16/20 = 8(2)/10(2) = 8/10. 8/10 can also be further reduced to 4/5.
Answer:
18
Step-by-step explanation: