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2 years ago

9

Describe the error of regression for each example l.

1 answer:

Basile [38]2 years ago

3 0

it isn't lined up to x straight while it's crooked

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Mary's children decide to run a lemonade stand to earn some extra money.The cost to start the business is $1.20 and each cup of

o-na [289]

They must sell, 30 cups of lemonade. How I got my answer.

Since it cost $1.20 to start, and a cup of lemonade cost $0.6 to make and there selling them at $0.10 each. So we know they are making a $0.4 profit off of each cup of lemonade. We now have to multiply 4×30=120.

I hope this helps!

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3 years ago

Read 2 more answers

An angle measures 61º. What is the measure of its supplement? HELP ME PLEASE

Irina-Kira [14]

The supplement of 61 degree is 119 degrees
180-61=119

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3 years ago

Can someone who's good at geometry pls help with my Khan Academy lil brainlist you

gtnhenbr [62]

Answer:

I guess I can!!

Step-by-step explanation:

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3 years ago

A random sample of 25 glass sheets is obtained and their thicknesses are measured. The sample mean is x= 3.54 mm and sample stan

lisabon 2012 [21]

Answer: (3.46, 3.62)

Step-by-step explanation:

The formula to find the confidence interval for population mean is given :-

$\overline{x}\ \pm\ t_{\alpha/2}\dfrac{s}{\sqrt{n}}$

, where n = sample size.

$t_{\alpha/2}$ = Two-tailed t-value for significance level of $(\alpha)$ and degree of freedom df= n-1.

$s$ = sample standard deviation.

As per given , we have

$\overline{x}= 3.54$ mm

s= 0.20 mm

n= 25

Significance level $=\alpha=1-0.95=0.05$

Since population standard deviation is not given , it means the given problem has t- distribution.

Two-tailed t-value for significance level of $(0.05)$ and degree of freedom df= 24:

$t_{\alpha/2\ ,df}=t_{0.025,\ 24}=2.0639$

95% Confidence interval for population mean:

$3.54\ \pm\ (2.0639)\dfrac{0.20}{\sqrt{25}}$

$=3.54\ \pm\ (2.0639)\dfrac{0.20}{5}$

$=3.54\ \pm\ (2.0639)(0.04)$

$=3.54\ \pm\ 0.082556$

$=(3.54- 0.082556,\ 3.54+ 0.082556 )=(3.457444,\ 3.622556)\approx(3.46,\ 3.62)$

Hence, the 95% two-sided confidence interval for the mean glass thickness = (3.46, 3.62)

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3 years ago

What is the GCF of the trinomial of 3x2 - 15x - 42

antiseptic1488 [7]

3 is the gcf btwn the 3 terms

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3 years ago