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3 years ago

Divide.

Mathematics

1 answer:

nika2105 [10]3 years ago

3 0

-0.8 that is the answer hope it helps

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In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 60

Olegator [25]

Answer:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

Step-by-step explanation:

Data provided

$\bar X=7.38$ represent the sample mean for the fuel efficiencies

$\mu$ population mean

s=2.51 represent the sample standard deviation

n=601 represent the sample size

Confidence interval

The formula for the confidence interval of the true mean is given by:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom for this case is given by:

$df=n-1=601-1=600$

The Confidence level for this case is 0.95 or 95%, and the significance level $\alpha=0.05$ and $\alpha/2 =0.025$ and the critical value is given by $t_{\alpha/2}=1.96$

Replcing into the formula for the confidence interval is given by:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

8 0

3 years ago

W Circumference (definition)

natita [175]

Answer:

Definition: The enclosing boundary of a curved geometric figure, especially a circle.

Step-by-step explanation:

8 0

2 years ago

709,189<br> +348,987<br> ________

Leni [432]

Answer: 1058176

check:

1058176 - 709,189= 348,987

6 0

3 years ago

Help fast please !!!!!

Butoxors [25]

Answer:

Step-by-step explanation: reduce mean divide so 400 divided by 4 =28

8 0

2 years ago

What is the equation of a line going through points (-15,70) and (5,10)

andrey2020 [161]

Simple....

you have:

(-15,70) and (5,10)

Using-->>

$\frac{ y_{1} -y_{2} }{ x_{1}- x_{2} }$

$\frac{70-10}{-15-5} = \frac{60}{-20} = -3$

Using y=mx+b...and any of the coordinates....

70= -3(-15)+b

70=45+b

70=45+b
-45 -45

25=b

y=-3x+25

Thus,your answer.

8 0

2 years ago