A company had it sales persons undergo training, hoping to improve their sales. Past sales data indicate that the average sale ewas P4,000 per transaction on a normally distrubuted population. After training, sales data, taken from a random sample of 25 salesmen/ salesladies, indicate and 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 two-tailed test? Did the training work at 95% confindence level? (d) Determine the confidence interval.

A company had it sales persons undergo training, hoping to improve their sales. Past sales data indicate that the average sale ewas P4,000 per transaction on a normally distrubuted population. After training, sales data, taken from a random sample of 25 salesmen/ salesladies, indicate and 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 two-tailed test? Did the training work at 95% confindence level? (d) Determine the confidence interval.

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Description: A company had it sales persons undergo training, hoping to improve their sales. Past sales data indicate that the average sale ewas P4,000 per transaction on a normally distrubuted population. After training, sales data, taken from a random sample of

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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