The National Football League (NFL) polls fans to develop a rating for each football game. Each game is rated on a scale from 0 (forgettable) to 100 (memorable). The fan ratings for a random sample of 12 games follow. 57 61 87 74 72 73 19 56 81 79 83 75 a. Develop a point estimate of mean fan rating for the population of NFL games (to 2 decimals). b. Develop a point estimate of the standard deviation for the population of NFL games (to 4 decimals).
Answers
The point estimates for the mean and standard deviation of the given data is respectively; 68 and 17.6
What is point Estimate?
A) To find the point estimate of the mean, we add all up all the data and divide by the number of values.
Thus;
∑x = 57 + 61 + 86 + 87 + 72 + 73 + 19 + 56 + 81 + 79 + 83 + 75 = 816
n = 12 numbers
Thus;
mean = ∑x/n = 816/12
Mean = 68
B) To find the estimate of the standard deviation, we would get it from the formula;
s = √[(n*(∑x²) - (∑x)²)/n(n - 1)]
∑x² = 572 + 612 + 862 + ... + 742 = 59,010
s = √[ (12*(59,010) - (816)²)/(12)(11)]
s = 17.6
Read more about Point Estimate at; brainly.com/question/9562180
Related Questions
In the figure, PR = 15x – 11 and PQ = 3x + 6. Find QR in terms of x.
A two pound box of spaghetti costs $2.50. Philip says that the unit cost is 2/2.50 =$0.80 per pound. Explain his error
Instructions: Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).Consider the functions f(x)=x^2+9x and g(x)=1/x.f(g(-1)) is g(f(1/2)) is
What three numbers can you multiply to get 24?
Answers
All you need to do is use a calculator or a piece of paper to answer this qeustion. Just multiply the numbers.
Answers
67.935=67+935/1000=67+187/200 = 67|187/200
======================================
Answers
Answer:
36
Step-by-step explanation:
Area of a square is s² , where 's' is the side length.
For a square of side length = 6 cm ,
The area = (6 cm)² = 36 cm²
* Why did your teacher say that you should not include units in your answer?
Anyway, the area without units is 36 .
Answers
=
=
=
Answers
The x-value of the intersection point of the lines is ( d - b)/(a-c)
Intersection of lines
Given the equation of a line expressed as;
y = ax +b and;
y = cx + d.
Equating both lines, we will have:
- ax + b = cx + d
Make x the subject of the formula:
ax - cx = d = b
x (a-c) = d - b
x = ( d - b)/(a-c)
Hence the x-value of the intersection point of the lines is ( d - b)/(a-c)
Learn more on intersecting lines here: brainly.com/question/2065148
Answers
Answer:
7.89
Step-by-step explanation:
Subtract on calculator bro!
Answer:
its 7.63
Step-by-step explanation: