1. Write a function that reads real (fractional) numbers , X1,X2,., XN from the keyboar into an array of N, starting from index e. The numbers are read after a prompt. 2. Write a function that displays the contents of an array in a predefined format wit the value of index 0, displayed last. 3. Write a function that uses the formulas below mean = (x, +x, ++ xw)/N s(x -)2 + (x - 5) + +(*-) N sd = vvariance a. Returns the mean (i.e. average) i, of the values in an array by value. variance = b. Returns the variance of the data set by reference. c. Returns the standard deviation of the data set by reference. 4. With the aid of the functions above, write a program that a. Gets from the user the size of a data set, N. b. Creates an array for real numbers using the value from (a) as size. c. Uses the function from (1) to populate the array with values from the user. d. Uses the function from (3) to get the mean, variance, and standard deviation. e. Uses the function from (2) to display the numbers in the array (data set). f. Displays the mean, variance, and standard deviation of the data set. SAMPLE RUN Enter size of data set: 5 Enter 5 numbers 2.4 -3 From the function in (1) 6 11.2 3 DATA SET Index 4: 3.000000 Index 3: 11.200000 From the function in (2) Index 2: 6.000000 Index 1: -3.000000 Index e: 2.400000 Mean: 3.92000e Variance: 21.673600 Standard Deviation: 4.655491
1. Write a function that reads real (fractional) numbers , X1,X2,., XN from the keyboar into an array of N, starting from index e. The numbers are read after a prompt. 2. Write a function that displays the contents of an array in a predefined format wit the value of index 0, displayed last. 3. Write a function that uses the formulas below mean = (x, +x, ++ xw)/N s(x -)2 + (x - 5) + +(*-) N sd = vvariance a. Returns the mean (i.e. average) i, of the values in an array by value. variance = b. Returns the variance of the data set by reference. c. Returns the standard deviation of the data set by reference. 4. With the aid of the functions above, write a program that a. Gets from the user the size of a data set, N. b. Creates an array for real numbers using the value from (a) as size. c. Uses the function from (1) to populate the array with values from the user. d. Uses the function from (3) to get the mean, variance, and standard deviation. e. Uses the function from (2) to display the numbers in the array (data set). f. Displays the mean, variance, and standard deviation of the data set. SAMPLE RUN Enter size of data set: 5 Enter 5 numbers 2.4 -3 From the function in (1) 6 11.2 3 DATA SET Index 4: 3.000000 Index 3: 11.200000 From the function in (2) Index 2: 6.000000 Index 1: -3.000000 Index e: 2.400000 Mean: 3.92000e Variance: 21.673600 Standard Deviation: 4.655491
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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