49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
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#include "../../squiggle.h"
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#include <math.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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double sample_minutes_per_day_jumping_rope_needed_to_burn_10kg(uint64_t* seed)
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{
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double kcal_jumping_rope_minute = sample_to(15, 20, seed);
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double kcal_jumping_rope_hour = kcal_jumping_rope_minute * 60;
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double kcal_in_kg_of_fat = 7700;
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double num_kg_of_fat_to_lose = 10;
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double hours_jumping_rope_needed = kcal_in_kg_of_fat * num_kg_of_fat_to_lose / kcal_jumping_rope_hour;
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double days_until_end_of_year = 152; // as of 2023-08-01
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double hours_per_day = hours_jumping_rope_needed / days_until_end_of_year;
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double minutes_per_day = hours_per_day * 60;
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return minutes_per_day;
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}
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int main()
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{
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// set randomness seed
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uint64_t* seed = malloc(sizeof(uint64_t));
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*seed = 1000; // xorshift can't start with 0
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int n = 1000 * 1000;
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double* result = malloc(sizeof(double) * n);
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for (int i = 0; i < n; i++) {
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result[i] = sample_minutes_per_day_jumping_rope_needed_to_burn_10kg(seed);
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}
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printf("How many minutes per day do I have to jump rope to lose 10kg of fat by the end of the year?\n");
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printf("Mean: %f\n", array_mean(result, n));
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printf("A few samples: [ ");
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for (int i = 0; i < 9; i++) {
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printf("%.6f, ", result[i]);
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}
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printf("... ]\n");
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struct c_i c_i_90 = get_90_confidence_interval(sample_minutes_per_day_jumping_rope_needed_to_burn_10kg, seed);
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printf("90%% confidence interval: [%f, %f]\n", c_i_90.low, c_i_90.high);
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free(seed);
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}
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