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3 years ago

Which line is the line of best fit for this scatter plot? A. B. C. D.

Mathematics

2 answers:

gregori [183]3 years ago

4 0

Answer: C

Step-by-step explanation:

ivanzaharov [21]3 years ago

4 0

Answer: c

hope that helps

Step-by-step explanation:

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Write an equation of each line in point-slope form. containing (2,1) and (3,4)

Leokris [45]

Answer:

y=3x-5

Step-by-step explanation:

This is the only line that will pass through these points.

7 0

3 years ago

Suppose you just received a shipment of nine televisions. Three of the televisions are defective. If two televisions are randoml

Temka [501]

<h2>Answer:</h2>

The probability that both televisions work is: 0.42

The probability at least one of the two televisions does not work is:

0.5833

<h2>Step-by-step explanation:</h2>

There are a total of 9 televisions.

It is given that:

Three of the televisions are defective.

This means that the number of televisions which are non-defective are:

9-3=6

The probability that both televisions work is calculated by:

$=\dfrac{6_C_2}{9_C_2}$

( Since 6 televisions are in working conditions and out of these 6 2 are to be selected.

and the total outcome is the selection of 2 televisions from a total of 9 televisions)

Hence, we get:

$=\dfrac{\dfrac{6!}{2!\times (6-2)!}}{\dfrac{9!}{2!\times (9-2)!}}\\\\\\=\dfrac{\dfrac{6!}{2!\times 4!}}{\dfrac{9!}{2!\times 7!}}\\\\\\=\dfrac{5}{12}\\\\\\=0.42$

The probability at least one of the two televisions does not work:

Is equal to the probability that one does not work+probability both do not work.

Probability one does not work is calculated by:

$=\dfrac{3_C_1\times 6_C_1}{9_C_2}\\\\\\=\dfrac{\dfrac{3!}{1!\times (3-1)!}\times \dfrac{6!}{1!\times (6-1)!}}{\dfrac{9!}{2!\times (9-2)!}}\\\\\\=\dfrac{3\times 6}{36}\\\\\\=\dfrac{1}{2}\\\\\\=0.5$

and the probability both do not work is:

$=\dfrac{3_C_2}{9_C_2}\\\\\\=\dfrac{1}{12}\\\\\\=0.0833$

Hence, Probability that atleast does not work is:

0.5+0.0833=0.5833

4 0

3 years ago

A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school w

AlekseyPX

Answer:

We have strong evidence that on average, students study less than 150 minutes per night during the school week

Step-by-step explanation:

Normal distribution:

mean μ₀ = 150

Sample:

Sample size n = 272

Sample mean x = 141

Sample standard deviation s = 66

The standard error of the sample mean SE = σ /√n

SE = 66/√272

SE = 66 / 16,49

SE = 4

Test Hypothesis:

Null hypothesis H₀ x = μ₀

Alternative hypothesis Hₐ x < μ₀

z(s) test statistics is:

z(s) = ( x - μ₀ ) / s/√n

z(s) = - 9 /4

z(s) = - 2,25

p-value for that z(s) p-value = 0,0122

Then for α = 0,05 p-value < 0,05

We are in the rejection region we need to reject H₀

7 0

3 years ago

In the equation y=x3 , what is the unit rate?

insens350 [35]

Idk ummmmmmmmmmmmmmm

4 0

3 years ago

Can someone help me please ?!!! 15 points please

ASHA 777 [7]

Answer: c.+dhf+2-4= 6)

Step-by-step explanation: Hope this helps!

7 0

3 years ago