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katrin [286]
3 years ago
9

A computer engineer is investigating whether the amount of installed RAM (random access memory) can be used to predict the mean

cost of a laptop with the operating system. The computer engineer collected a sample of 20 laptops with the same operating system. The engineer wants to estimate the mean change in the cost, in dollars, for each increase of 1 gigabyte of installed RAM. Assuming the conditions for inference have been met, which of the following inference procedures is the most appropriate for such an investigation?
a. A two-sample z-interval for a difference between proportions.
b. A two-sample t-interval for a difference between means.
c. A matched-pairs t-interval for a mean difference.
d. A one-sample t-test for means.
e. A linear regression t-interval for slope
Mathematics
1 answer:
Over [174]3 years ago
7 0
I agree with (a). As the best sentence
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9x^2 y^2 and 5x^2 y^3 look for the greatest common factor
Aneli [31]

Answer:

x^2 y^2

Step-by-step explanation:

9x^2y^2/x^2y^2=9

5x^2y^2/x^2y^2=5

since 9 and 5 have no common factors except 1, x^2 y^2

mark as brainliest plz

8 0
3 years ago
Please help and fast
kirza4 [7]

A the slope of the line is 1

to calculate the slope m , use the ' gradient formula '

m = ( y₂ - y₁ ) /( x₂ - x₁ )

where (x₁, y₁ ) = 6, 3) and (x₂, y₂ ) = (9, 6)

m = \frac{6 - 3}{9 - 6} = \frac{3}{3} = 1


5 0
3 years ago
Whats between 5 and 10?
Degger [83]

There are an infinite amount of numbers between 5 and 10 if you consider decimal positions.

However, if you're referring to whole numbers (example: 5, 25, 200, etc)

There are 4 numbers between 5 and 10:

6, 7, 8, and 9.

7 0
3 years ago
PLEASE HELP!!! BRAINLIEST!!!
KATRIN_1 [288]

Answer:

6x ≤ 40

x ≤ 6

Step-by-step explanation:

Assuming you mean that every time you make a product, $6 dollars comes off your limit:

6x ≤ 40

x ≤ 6.666666...

Because you cant make a fraction of a product:

x ≤ 6


7 0
4 years ago
Which statement best explains if the graph correctly represents the proportional relationship y = 0.5x?
ehidna [41]
The <u>correct answer</u> is:

<span>A) Yes, the points shown on the line would be part of y = 0.5x.

Explanation:

Looking at the graph, the line goes through (0, 0).  If x=0, we have
y=0.5(0)=0.  
This is the y-coordinate of the point, so it goes through this.

The equation for this line is in slope-intercept form, y=mx+b, where m is the slope and b is the y-intercept.  In this equation, m=0.5 and b=0.  This means the slope is 0.5 or 1/2; since slope is rise/run, this means the line rises 1 for every horizontal increase of 2.  

This means starting from (0, 0), we would go up 1 and over 2, creating the point (2, 1).  Looking at the graph, the line goes through this point.

Next we would go up 1 and over 2 again, to (4, 2).  Again, the line goes through this point.

We could follow all of the points on this line and they all fit.</span>
3 0
3 years ago
Read 2 more answers
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