Answered: A company had its sales persons undergo…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

A company had its sales persons undergo training, hoping to improve their sales.
Past sales data indicate that the average sale was P4,000 per transaction on a
normally distributed population. After training, sales data, taken from a random
sample of 25 salesmen/salesladies, indicates an average sale of P4,500 with a
standard deviation of P150. (a) Write the null hypothesis. (b) Write the alternative
hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or twotailed test? Did the training work at 95% confidence level? (d) Determine the
confidence interval.

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.

Expert Solution

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Equality of Variances$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions