Mathematics, 10.11.2019 20:31 valeriam24

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).

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Answer from: dollaass17

a. The estimate of mean fan rating for the population of NFL games=68.08

b. The estimate of standard deviation=18.8785

Step-by-step explanation:

Given

The fan ratings for a random sample of 12 games follow:

57, 61, 87,74,72,73,19,56,81,79,83 and 75

a.Mean = $\frac{ sum\;of\;data}{ total\;number \; of data}$

Mean= $\frac{57+61+87+74+72+73+19+56+81+79+83+75}{12}$

Mean= 68.08

b. $\mid x-\bar x\mid$ ${\mid x-\bar x\mid}^2$

11.08 122.7664

7.08 50.1264

18.92 357.9664

5.92 35.0464

3.92 15.3664

4.92 72.6192

49.08 2408.8464

12.08 145.9264

12.92 166.9264

10.92 119.2464

14.92 734.064

6.92 47.8864

Standard deviation= ${\sqrt\frac{\sum{\mid x-\bar x\mid}^2}{n}$

n=12

$\sum{\mid x-\bar x\mid}^2=4276.7872$

Standard deviation= $\sqrt\frac{4276.7872}{12}$

Standard deviation= $\sqrt{356.3989}$

Standard deviation = 18.8785

The estimate of the standard deviation for the population of NFL games=18.8785

Answer from: Quest

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

Answer from: Quest

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !

Categorize the graph as linear increasing, linear decreasing, exponential growth, or negative expone

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