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antoniya [11.8K]
4 years ago
10

What type of association does the graph show between x and y?

Mathematics
1 answer:
Anni [7]4 years ago
3 0
The points are all over the place
No association
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A data set includes data from student evaluations of courses. The summary statistics are n​, ​, s. Use a significance level to t
Andru [333]

Complete question :

A data set includes data from student evaluations of courses. The summary statistics are nequals92​, x overbarequals4.09​, sequals0.55. Use a 0.10 significance level to test the claim that the population of student course evaluations has a mean equal to 4.25. Assume that a simple random sample has been selected. Identify the null and alternative​ hypotheses, test​ statistic, P-value, and state the final conclusion that addresses the original claim.

Answer:

H0 : μ = 4.25

H1 : μ < 4.25

T = - 2.79

Pvalue =0.0026354

we conclude that there is enough evidence to conclude that population mean is different from 4.25 at 10%

Step-by-step explanation:

Given :

n = 92​, xbar = 4.09​, s = 0.55 ; μ = 4.25

H0 : μ = 4.25

H1 : μ < 4.25

The test statistic :

T = (xbar - μ) ÷ s / √n

T = (4.09 - 4.25) ÷ 0.55/√92

T = - 0.16 / 0.0573414

T = - 2.79

The Pvalue can be obtained from the test statistic, using the Pvalue calculator

Pvalue : (Z < - 2.79) = 0.0026354

Pvalue < α ; Hence, we reject the Null

Thus, we conclude that there is enough evidence to conclude that population mean is different from 4.25 at 10%

4 0
3 years ago
Write an equation of the line passing through (-6, 1) that is perpendicular to the line 2x -5y = 2
Bess [88]

Answer:

y= -5/2 x + 14 (point slope form)

2y+5x=28 (standard form)

Step-by-step explanation:

Perpendicular lines met the following condition

m1*m2=-1 (the product of their slopes is -1)

To obtain m2, the slope of our desired line lets first re arrange the equation of the first line. 2x-5y=2, so. 2x-2=5y.

Isolating y, leads the following, result: y= 2/5 x - 2/5

m1=2/5

m2 is =-5/2

The equation of our desired line is the following

y=mx+b, we have m, which is -5/2, but still need to find value for b.

Lets now evaluate the above equation in the given point (-6,1).

1=-6 * -5/2 + b.

b=14.

Now we can say the equation that our desired line is

y= -5/2 x + 14 (point slope form)

Or... If we group variables 'x' and 'y' together

y+5/2 x = 14, we want integer coefficients, so lets multiply this expression by 2, to obtain the following:

2y+5x=28

4 0
3 years ago
A. 117.2<br> B. 468.9<br> C. 410.3<br> D. 205.1
Arte-miy333 [17]

Answer:

The answer is C

Step-by-step explanation:

Fuente: Mis huevos

7 0
3 years ago
10)
sladkih [1.3K]

Answer:

<u>(7x + 6) tickets</u>

Step-by-step explanation:

Tickets Ross has : 8x - 5

Tickets Ross needs : 15x + 1

To find out the remaining amount, subtract the tickets Ross has from the number of tickets he needs.

  • 15x + 1 - (8x - 5)
  • 15x + 1 - 8x + 5
  • <u>(7x + 6) tickets</u>
5 0
2 years ago
Read 2 more answers
Which statement is true?
malfutka [58]
None of the above is true

3 0
3 years ago
Read 2 more answers
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