Question

Your program should read in a set of grades (that are all integers) entered by the user. The user will signify the end of the list of grades by entering -999. Do NOT process this value. You can assume that the user will enter at least three grades and not more than 100 grades, all of which will be integers in between 0 and 100, inclusive. For the set of grades, your program should compute the minimum value, print this out to two decimal places and remove it from the data. Then your program should compute the maximum value, print it out to two decimal places and remove it from the data. Then, your program should calculate the mean and standard deviation for the remaining set of grades, and print these out to two decimal places. Finally, a histogram for this data (without the highest and lowest grades) should be printed out as well.

Your program should include the following functions:
void readGrades (double grades [], int *n);
/* This function reads an unknown number of grades (maximum of 100) into the array grades and counts the data items that have been read. You are not supposed to prompt the user to enter the grades. Just use scanf to read in the grades. The end of the input is represented by a negative number 999 */ Preconditions: An empty array which is initialized to 0 must be passed to the function.
Postconditions: Array effective size of the read) */ holds the input values and n is the array (i.e the number of data items
void frequency (double grades [], int n)
/* Given an array of real numbers, this function finds out frequency (number of students) for each interval 0-4, 5- 9,...,95 99, 100 prints out the frequency values and plots the histogram */
int maximum (double grades [], int n) ;
/* Given an array of real numbers and the effective size of the array (i.e. count of the numbers in the array), this

Answer 1

To analyze a set of grades, calculate the sample mean, standard deviation, and construct a histogram to visualize the data. From there, determine quartiles, IQR, and other statistical measures as needed.

Step-by-step explanation:

To calculate various statistical measures from a set of data, you can follow these steps:

• Compute the sample mean (μ), which is the average of the data set
• Calculate the sample standard deviation (s), which measures the amount of variation or dispersion of a set of values
• Construct a histogram to visualize the frequency distribution of the data
• Use the histogram to find the quartiles and interquartile range (IQR), as well as to determine the shape of the distribution
• If required, calculate specific percentiles or probabilities based on the data distribution

To create a complete chart, fill in data frequencies, relative frequencies, and cumulative relative frequencies to three decimal places. Additionally, calculate the median, first quartile, third quartile, and IQR to one decimal place.

To apply these concepts to specific scenarios, such as sports stadium capacities or student grades, use the appropriate statistical techniques discussed above.