# help required urgent

#### saima1

##### New Member
A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling price (in thousands of dollars) also increases? Here are the data points. Make sure you enter these in order!
Home Sizes: 1.4; 1.3; 1.2; 1.1; 1.4; 1.0; 1.3; 0.8; 1.2; 0.9; 1.1; 1.1
Respective selling price: 100; 110; 105; 120; 80; 105; 110; 85; 105; 75; 70; 95
Determine the independent and dependent variables (X and Y axes)
Compute the coefficients of correlation and determination
interpret the results
Can we conclude there is a relationship?

#### GretaGarbo

##### Human
Saima1!

(And, you titles is not very informative. Try to avoid words like "help" and "please" since they are not informative. And please don't double post.)

#### bugman

##### Super Moderator
Welcome to the forum saima1,
GretaGarbo is right, please take a moment to read this. And you might want to reformulate your post.

#### saima1

##### New Member
A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling price (in thousands of dollars) also increases? Here are the data points. Make sure you enter these in order!
Home Sizes: 1.4; 1.3; 1.2; 1.1; 1.4; 1.0; 1.3; 0.8; 1.2; 0.9; 1.1; 1.1
Respective selling price: 100; 110; 105; 120; 80; 105; 110; 85; 105; 75; 70; 95
1.Determine the independent and dependent variables (X and Y axes)
2.Compute the coefficients of correlation and determination
3.interpret the results
4.Can we conclude there is a relationship?
hello everyone,
coefficient of correlation: 0.30722 and coefficient of determination 0.0944, I did this this question in excel. but I want to confirm my answer. and the relationship between both variables as I am not satisfied with my answers

#### saima1

##### New Member
Seems OK.

According to my opinion there is a relationship but not that much strong positive relationship.

#### saima1

##### New Member
another question:
our convenience store in Zap, ND. Let s assume your friend says that the average sale of all her customers is $23.00. Your friend does not know the standard deviation of the population of sales. (I guess that is why she hired you as her consultant.) You setup a random sampling technique whereby you ask your friend to randomly sample 50 customers in a particular month. Your friend reports that her sample of 50 customers had an average purchase of$25.00. Is this reasonable? In other words, what is the likelihood of this occurring? You will need to know the standard deviation of the sample... assume you calculated it and it was \$3.00. Your friend wants to know if this was a true (reasonable) sampling of her customers. What do you tell her? Can you deduce if her business is increasing?
( now in this question what confidence interval do i have to use? my standard error when I used 80% confidence level is 42%. Can u help me with the steps of this question?
first I have to calculate upper and lower z score, then upper and lower bound?

#### GretaGarbo

##### Human
According to my opinion there is a relationship but not that much strong positive relationship.
What is the main statistical method to investigate if there is a positive relationship?
Opinion are good but now you need an objective method.

... store in Zap, ND
I have no idea what that is.

Can u help

#### Miner

##### TS Contributor
@Greta I believe that ND is probably North Dakota, USA. Zap would be a city in North Dakota.

#### GretaGarbo

##### Human
@Greta I believe that ND is probably North Dakota, USA. Zap would be a city in North Dakota.
Thanks! But why doesn't he says so? I thought that it was context for his homework - a business sector or something.

I find it strange that someone writes to an international community and writes like that.

How many knows what is the state name where Karabiner is in Germany, or the state name in India where vinux is, and even less so the acronyms? And India is at least twice as big as USA.