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e-lub [12.9K]
4 years ago
5

When do sky divers use decimals

Mathematics
2 answers:
Alborosie4 years ago
7 0
The tenth situation
morpeh [17]4 years ago
4 0
In a tenths situation
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Listed below are numbers of internet users per 100 people and numbers of scientific award winners per 10 million people for diff
Yuliya22 [10]

Answer:

There is not sufficient evidence to support a claim of linear correlation between the two variables.

Step-by-step explanation:

The data provided is as follows:

X        Y

78       5.5

79       8.8

56.2      3.3

68.3       1.7

77.9      10.8

38.2       0.1

(a)

The scatter plot is attached below.

(b)

Use the Excel function: =CORREL(array1, array2) to compute the correlation coefficient, <em>r</em>.

The correlation coefficient between the number of internet users and the award winners is,

<em>r</em> = 0.797.

(c)

The test statistic value is:

t=r\sqrt{\frac{n-2}{1-r^{2}}}

  =0.797\times\sqrt{\frac{6-2}{1-(0.797)^{2}}}\\\\=0.797\times 3.311372\\\\=2.639163484\\\\\approx 2.64

The degrees of freedom is,

df = n - 2

   = 6 - 2

   = 4

Compute the <em>p</em>-value as follows:

p-value=P(t_{n-2}

*Use a <em>t</em>-table.

<em>p</em>-value = 0.057 > <em>α</em> = 0.05

The null hypothesis will not be rejected.

Thus, it can be concluded that there is not sufficient evidence to support a claim of linear correlation between the two variables.

3 0
4 years ago
What is the original price:$65.00; Markdown: 12%
alexandr1967 [171]
The answer to this question is $57.02
6 0
3 years ago
Graph each function.
artcher [175]

Answer:

Step-by-step explanation:

We can recognize that the parent function for all of these graphs is going to be y=x^2. What this means is that we can graph y=x^2 and then apply transformations to it to get to all of these new graphs.

1. y = -x^2 + 5

We can see that the coefficient of the x^2 term is negative which tells us that the graph will now open downwards.

We also know that we are adding 5 on the outside of the argument which means it affect vertical shift. Therefore, we will be moving 5 units up.

2. y = x^2 - 4

We can see that the only change made to this equation is subtracting 4 on the outside of the squared part of the equation. Again, this signifies vertical movement, but since it's negative we will be moving the entire y = x^2 graph down 4 units.

3. y = -x^2 - 1

What do you notice about this graph?

- negative coefficient

- subtracting 1 outside of the argument

What do these mean?

- negative coefficient: opens downwards

- subtracting 1: move entire y = x^2 graph down 1 unit

7 0
3 years ago
What is the value of n?
Valentin [98]

Answer:

n=6

Step-by-step explanation:

Consider the diagram below

Using the Theorem of Intersecting Chords

AE X ED= BE X EC

5 X n = 2 X 15

5n =30

n= 30/5 = 6

4 0
3 years ago
Solve the simultaneous equations<br> 7x – 3y = 24<br> 2x + 3y = 3<br> x=?<br> y =?
Ivahew [28]

Answer:

×=3 y=-1

Step-by-step explanation:

I hope this helps

4 0
3 years ago
Read 2 more answers
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