Answered: A group of students have studied the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A group of students have studied the rainfall average. Based on the study, in area A, the rainfall average is 4.93 cm with standard deviation 1.14 cm in December for last 15 years. While for area B has the rainfall average of 2.64 cm with standard deviation 0.66 cm in December for the last 10 years. Find the 95% confidence interval for the difference means of the rainfall in both places. Assume that the populations are normally distributed with unequal variance.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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