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lys-0071 [83]
3 years ago
13

Need help on this assignment

Mathematics
2 answers:
Anna007 [38]3 years ago
6 0

x-1 + x0 + x1 = (-1)^2 + 5  + (0)^2 + 5  +  (1)^2 + 5  = 6 + 5 + 6 = 17

Luda [366]3 years ago
3 0

Answer:

(-1)^2+5= 1+5=6

(0)^2+5= 0+5= 5

(1)^2+5= 1+5= 6

6+5+6= 17

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You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly sele
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Answer:

The margin of error for this estimate is of 14.79 yards per game.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

T interval

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95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.093

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards.

This means that n = 20, s = 31.61

What is the margin of error for this estimate?

M = T\frac{s}{\sqrt{n}}

M = 2.093\frac{31.61}{\sqrt{20}}

M = 14.79

The margin of error for this estimate is of 14.79 yards per game.

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This is what i think the answer is hope it helps

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