1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ksenya-84 [330]
3 years ago
7

show three ways to estimate 3/5 ×9 1/2. identify each method you use. ( I have estimating and compatible. another one is what I

need please. give an example)
Mathematics
1 answer:
Iteru [2.4K]3 years ago
6 0
12 because I said so :)
You might be interested in
Betty earns $7.50 per hour at a part time job. Let x be the number of hours and y be the amount she earns. Betty makes a graph t
Nadya [2.5K]
She worked 8 hours

$60 / $7.50 (per hour) = 8 hours
5 0
3 years ago
(a) For the accompanying data set, draw a scatter diagram of the data.
lidiya [134]

Answer:

a) n=5 \sum x = 30, \sum y = 25, \sum xy = 162, \sum x^2 =206, \sum y^2 =155  

r=\frac{5(162)-(30)(25)}{\sqrt{[5(206) -(30)^2][5(155) -(25)^2]}}=0.42967  

So then the correlation coefficient would be r =0.430 rounded

b) Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0  

Because the correlation coeffcient is positive and the absolute value of the correlation coefficient 0.430 is not greater than the critical value for this dataset, no linear relation exists between x and y.

And the reason is because we fail to reject the null hypothesis.

Step-by-step explanation:

Part a

We have the following data:

x: 2  6  6  7  9

y: 3  2  6  9  5

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

For our case we have this:

n=5 \sum x = 30, \sum y = 25, \sum xy = 162, \sum x^2 =206, \sum y^2 =155  

r=\frac{5(162)-(30)(25)}{\sqrt{[5(206) -(30)^2][5(155) -(25)^2]}}=0.42967  

So then the correlation coefficient would be r =0.430 rounded

Part b

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: \rho =0

Alternative hypothesis: \rho \neq 0

The statistic to check the hypothesis is given by:

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

And is distributed with n-2 degreed of freedom. df=n-2=5-2=3

In our case the value for the statistic would be:

t=\frac{0.430\sqrt{5-2}}{\sqrt{1-(0.430)^2}}=0.825

The critical value for n =5 is given by the table attached. We can see that the critical value is r_{crit}= 0.878, and then the final conclusion would be:

Because the correlation coeffcient is positive and the absolute value of the correlation coefficient 0.430 is not greater than the critical value for this dataset, no linear relation exists between x and y

And the reason is because we fail to reject the null hypothesis.

4 0
2 years ago
6 x 8 x 8 x 6 x 8 x 8 x 6
Darina [25.2K]

Answer:

884736

Step-by-step explanation:

Multiply using the order of operations, from left to right.

6 0
2 years ago
Evaluate the expression 5x-3x+5 for each value of x
kirza4 [7]

Answer:

2x+5

Step-by-step explanation:

Hope I helped :)

4 0
3 years ago
A rectangle measures 14cm by seven cm what is its area
Nezavi [6.7K]
98 Cm should be the answer
6 0
2 years ago
Other questions:
  • If a can of soup cost $1.50 answers three people how much would it cost to serve soup to 12 people
    7·2 answers
  • The equation 25x^2+25y^2=125 represents which conic section
    6·1 answer
  • 1. 15% of 20 is _____.
    11·1 answer
  • What is 1/100th of 882
    8·2 answers
  • John and David graphed a circle with center (-3,1)
    6·1 answer
  • Are these the correct answers? I hunk I got some wrong pls help
    8·1 answer
  • Help me please!! i’m confused!!
    7·1 answer
  • What is the perimeter of thsi shape ??!
    15·1 answer
  • 100 point split nuke yw
    7·2 answers
  • What are the solutions to the equation 2x^{2}=4x-7 ?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!