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2 years ago

8

What does it mean to say that a data point has a residual of 0?

1 answer:

tigry1 [53]2 years ago

8 0

The answer is the point lies directly on the regression line.

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Pls i cannot fail this !

FrozenT [24]

A= 3.14* 12^2
= 3.14* 144
= 452.16cm^2

3 0

2 years ago

Read 2 more answers

xander takes a quiz worth 50 points. each question is worth 10 points. sketch a graph to show his score if he missed 1,2,3,4 or

Marysya12 [62]

If the quiz is worth 50 points and each question is worth 10 that means for every question he could’ve missed would be taking away 10 from that 50. So lets say if he misses 2 questions. 2 x 10 would be 20. You take away 20 from 50 which would be: 50 - 20 = 30. And it goes on from there.

Hope that helps!

7 0

2 years ago

_______x (-4) = 48.

Zinaida [17]

Answer:

-12

Step-by-step explanation:

you have to divide 48 to (-4) and it equals to -12

so you multiply -12 to (-4) and it gives you 48

3 0

3 years ago

What is -7.9? I really need help ASAP

Lunna [17]

Answer:

Negative 7.9

Step-by-step explanation:

-7.9 is just negative 7.9.

Do you need this as fraction? If you do, I can help ^^

3 0

3 years ago

A trucking firm suspects that the mean life of a certain tire. it uses is less than 33,000 miles. To check the claim, the firm r

Mice21 [21]

Answer:

We accept the alternate hypothesis. We conclude that the mean lifetime of tires is is less than 33,000 miles.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 33,000 miles

Sample mean, $\bar{x}$ = 32, 450 miles

Sample size, n = 18

Alpha, α = 0.05

Sample standard deviation, s = 1200 miles

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu = 33000\text{ miles}\\H_A: \mu < 33000\text{ miles}$

b) Level of significance:

$\alpha = 0.05$

c) We use One-tailed t test to perform this hypothesis.

d) Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{32450 - 33000}{\frac{1200}{\sqrt{18}} } = -1.9445$

Now, $t_{critical} \text{ at 0.05 level of significance, 17 degree of freedom } = -1.7396$

Rejection area:

$t < -1.7396$

Since,

$t_{stat} < t_{critical}$

e) We fail to accept the null hypothesis and reject it as the calculated value of t lies in the rejection area.

f) We accept the alternate hypothesis. We conclude that the mean lifetime of tires is is less than 33,000 miles.

3 0

3 years ago