Question

Please Help!(Write a C++ program Only):- The attached file has a number of records giving US state names, populations, and number of Federal electors. The fields are delimited by spaces. The first field is a single integer giving the number of states that follow.

Guidelines:- 1)Read the first integer and use it to allocate dynamic arrays to contain the state name and the state population. 2) Read in the population data. The electors field is not used. 3) Calculate the mean of the population of the states. 4) Calculate the standard deviation of the population of the states. 5) List the states whose populations are within 0.5 standard deviations of the mean popluation. 6) Calculate the percentage of state that satisfy this criteria. 7) Cleanup.

Formulas

Mean

Variance

Standard Deviation

The assignment is to calculate and display some statistics about the state population data, as shown below.

Output:-

US Population Statistics as of 2015 (51 states)

  Total population: 321418820
  Population mean:6302329.8
  Population standard deviation:7130151.4
States whose population is within .5 standard deviations of the mean:
  New_Jersey
  Virginia
  ...
  Nevada
____% of the states are within .5 standard deviations of the mean population

file name is "us-pop-by-state-with-electors-2015.txt" I couldn't able to upload so I pasted below:-

California 39144818 55
Texas 27469114 38
Florida 20271272 29
New_York 19795791 29
Illinois 12859995 20
Pennsylvania 12802503 20
Ohio 11613423 18
Georgia 10214860 16
North_Carolina 10042802 15
Michigan 9922576 16
New_Jersey 8958013 14
Virginia 8382993 13
Washington 7170351 12
Arizona 6828065 11
Massachusetts 6794422 11
Indiana 6619680 11
Tennessee 6600299 11
Missouri 6083672 10
Maryland 6006401 10
Wisconsin 5771337 10
Minnesota 5489594 10
Colorado 5456574 9
South_Carolina 4896146 9
Alabama 4858979 9
Louisiana 4670724 8
Kentucky 4425092 8
Oregon 4028977 7
Oklahoma 3911338 7
Connecticut 3590886 7
Iowa 3123899 6
Utah 2995919 6
Mississippi 2992333 6
Arkansas 2978204 6
Kansas 2911641 6
Nevada 2890845 6
New_Mexico 2085109 5
Nebraska 1896190 5
West_Virginia 1844128 5
Idaho 1654930 4
Hawaii 1431603 4
New_Hampshire 1330608 4
Maine 1329328 4
Rhode_Island 1056298 4
Montana 1032949 3
Delaware 945934 3
South_Dakota 858469 3
North_Dakota 756927 3
Alaska 738432 3
Washington_DC 672228 3
Vermont 626042 3
Wyoming 586107 3

Thank you so much for helping.

Answer 1

Here is the code for the first few parts.....

#include <iostream>
#include <iomanip>
#include <cmath>
#include <fstream>
using namespace std;
long totalCalc(long *population, int size)
{
    long total = 0;
    for(int i = 0; i < size; i++)
        total += *(population + i);
    return total;  
}
int main()
{
    ifstream fin;
    fin.open("USPopulationByStateWithElectors2015.txt");
    if(!fin.is_open())
    {
       cout << "Unable to open the file." << endl;
       return 0;
    }
    //1)Read the first integer and use it to allocate dynamic arrays to contain the
    //   state name and the state population.
    int numOfStates;
    fin >> numOfStates;
    string *states = new string[numOfStates];
    long *population = new long[numOfStates];
    int *electors = new int[numOfStates];
    //2) Read in the population data. The electors field is not used.
    for(int i = 0; i < numOfStates; i++)
        fin >> *(states + i) >> *(population + i) >> *(electors + i);
    cout << "US Population Statistics as of 2015 (" << numOfStates << " states)" << endl;
    long totalPopulation = totalCalc(population, numOfStates);
    cout << "Total population: " << totalPopulation << endl;
    //3) Calculate the mean of the population of the states.
    double mean = totalPopulation / (double)numOfStates;
    cout << "Population mean: " << fixed << setprecision(2) << mean << endl;
    double stdDev = 0;
    for(int i = 0; i < numOfStates; i++)
        stdDev += pow((*(population + i) - mean), 2);   //Sum of (number - average) whole square.
    stdDev = sqrt(1/(double)numOfStates * stdDev);
    cout << "Population standard deviation: " << stdDev << endl;
    cout << "States whose population is within .5 standard deviations of the mean:" << endl;
    for(int i = 0; i < numOfStates; i++)
        if(abs(*(population + i) - stdDev) <= 0.5)
            cout << *(states + i) << endl;     
}

And the output screenshot is:

Terminal Shell Edit View Window Help 1.18 GB (D < >し 令동啦) 99% E ฏิเ Sun 9 Apr 01:45 ANANDA KUMAR THUMMAPUDI E Currently Open Docume.. GeneralFile.txt #include <iostream> #include qomanip> #include <Cmath> #include <fstream> using namespace std; G MeanVarianceS... USPopulationB.. USPopulationSt.... ! HomeworkLibCPPー-bash-91x 29 6 Long totalCalc ong *population, int size) -bash HomeworkLibCPP--bash Macintosh:HomeworkLibCPP AnandaKumarThunmapudis g+USPopulationStats.cpp Macintos:HomeworkLibCPP AnandaKumarThunmapudis ./a.out US Population Statistics as of 2015 (51 states Total population: 321418820 Population nean: 6302329.80 Population standard deviation: 7130151.43 States whose population is within .5 standard deviations of the mean: Macintosh:HomeworkLibCPP AnandaKumarThunmapudis long total 8; for(int i-; i < size; i++) total *(population i); return total; int main) ifstream fin; fin.open("USPopulationByStatewithElectors2015.txt"); if (!fin.is_open()) cout << "Unable to open the file." << endl; return //1)Read the first integer and use it to allocate // state name and the state population. int num0fstates; fin numOfStates string *states new string [numofStates]; Long *populationnew long [numofStates]; int electors new int [numofStates] //2) Read in the population data. The electors field for(int i ; i < numofStates; i++) fin (states +i) >(population i) >>e cout <<"US Population Statistics as of 2015 (" <num long totalPopulation = totalCalc (population, numOf Stat cout < "Total population: "< totalPopulation << //3) Calculate the mean of the population of the sta double meantotalPopulation(double)numOfStates; cout <"Population mean: "<<fixed << setprecision(2) << nean << endl; double StdDev = 0; for(int i ; i < numofStates; i++) stdDev pow( (*(population + i) -mean), 2); //Sun of (number-average) whole squa re += stdDev sqrt (1/(double)numOfStates stdDev); cout cs "Population standard deviation: "<< stdDev < endl cout < "States whose population is within.5 standard deviations of the mean:" << endl; for(int i-; i < numofStates; i++) if(abs(*(population i) -stdDev)8.5) cout << (statesi) << endl; 46 47

Sorry. I didn't got your points for the last 2 points. Please be clear, or give some formula, for that.