Functions and Arrays (C)

[BelleBaby]

I have an assignment that I think I more or less understand, but I am lost on how to use functions correctly. As well, we are to include an array that I have no clue how to do.


here is the equation we need to use: x (+-) z o/sqrtN
o = standard deviation
x = sample mean
N = number of samples in the population
z = critical point for the confidence level

The most comment values of z are given below:
Confidence level p z
90% 0.05 1.645
95% 0.025 1.960
99% 0.005 2.576
(I don't know if that part is extremly relevant right now but I included it just in case)

It then says write a program to calculate the confidence interval of the following database. (then it gives 12 different numbers.)

My problem is that I have no clue how to include an array (tried it in another assignment but didn't get it). and I don't know how to properly work a function.

Anything that could get me started would be a big help. I can manage writing a skeleton for this project if I know how to go about using an array and function.

Thank you in advance

[Meetee]

I have an assignment that I think I more or less understand, but I am lost on how to use functions correctly. As well, we are to include an array that I have no clue how to do.


here is the equation we need to use: x (+-) z o/sqrtN
o = standard deviation
x = sample mean
N = number of samples in the population
z = critical point for the confidence level

The most comment values of z are given below:
Confidence level p z
90% 0.05 1.645
95% 0.025 1.960
99% 0.005 2.576
(I don't know if that part is extremly relevant right now but I included it just in case)

It then says write a program to calculate the confidence interval of the following database. (then it gives 12 different numbers.)

My problem is that I have no clue how to include an array (tried it in another assignment but didn't get it). and I don't know how to properly work a function.

Anything that could get me started would be a big help. I can manage writing a skeleton for this project if I know how to go about using an array and function.

Thank you in advance

I have some doubts regarding your problem statement. The equation given (x (+-) z o/sqrtN ) is to find confidence interval? Anyways if it is so and numbers given in database gives the value of N then you can take the array of N and can store the values in that array.

I think you have not given the complete statement but still you can make a function with parameters passed to find the ultimate equation value.

Hope it helps!
Regards

[sicarie]

I'd also recommend the cplusplus.com's data type tutorial as well as their functions tutorial .