C++ code ONLY please! Write a program that computes the central tendencies from a txt file: mean, mode, median and the variation: variance, standard deviation, standard error and range for a set of numbers given in the data file The output should be to two decimal places.

Mean xxx.xx

Variance xxx.xx

Median xxx.xx

Std. Dev xxx.xx

Std. Error xxx.xx

Mode xxx.xx

Range xxx.xx

A hospital administrator wished to develop a regression model for predicting the degree of long-term recovery after discharge from the hospital for severely injured patients. The predictor variable to be utilized is number of days of hospitalization (X), and the response variable is a prognostic index for long- term recovery (Y), with large values of the index reflecting a good prognosis. Data for 15 patients were studied and are presented in a file Related earlier studies reported in the literature found the relationship between the predictor variable and the response variable to be exponential. Hence, it was decided to investigate the appropriateness of the two-parameter nonlinear exponential regression mode.

Days Prognostic_index 2 54 5 50 7 45 10 37 14 35 19 25 26 20 31 16 34 18 38 13 45 8 52 11 53 8 60 4 65 6